Follow Shopify ruby style

This is the first step in bringing Liquid style inline with Shopify ruby style

.gitignore

@@ -4,7 +4,6 @@
 pkg
 *.rbc
 .rvmrc
-.idea
 .ruby-version
 Gemfile.lock
 .bundle

.rubocop.yml

@@ -1,10 +1,16 @@
 inherit_from:
-  - .rubocop.shopify.yml
+  - https://shopify.github.io/ruby-style-guide/rubocop.yml
+  - .rubocop_todo.yml
 
 require: rubocop-performance
 
 Performance:
   Enabled: true
 
-Metrics/LineLength:
-  Enabled: false
+AllCops:
+  Exclude:
+    - 'vendor/bundle/**/*'
+      
+Naming/MethodName:
+  Exclude:
+    - 'example/server/liquid_servlet.rb'

.rubocop_todo.yml

@@ -0,0 +1,411 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-08-29 12:16:25 +1000 using RuboCop version 0.74.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 13
+# Cop supports --auto-correct.
+# Configuration parameters: AllowMultipleStyles, EnforcedHashRocketStyle, EnforcedColonStyle, EnforcedLastArgumentHashStyle.
+# SupportedHashRocketStyles: key, separator, table
+# SupportedColonStyles: key, separator, table
+# SupportedLastArgumentHashStyles: always_inspect, always_ignore, ignore_implicit, ignore_explicit
+Layout/AlignHash:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'lib/liquid/expression.rb'
+    - 'performance/shopify/comment_form.rb'
+    - 'performance/shopify/database.rb'
+    - 'performance/shopify/paginate.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment, AllowBeforeTrailingComments, ForceEqualSignAlignment.
+Layout/ExtraSpacing:
+  Exclude:
+    - 'performance/shopify/paginate.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: squiggly, active_support, powerpack, unindent
+Layout/IndentHeredoc:
+  Exclude:
+    - 'test/integration/tags/for_tag_test.rb'
+    - 'test/integration/trim_mode_test.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: symmetrical, new_line, same_line
+Layout/MultilineMethodCallBraceLayout:
+  Exclude:
+    - 'test/integration/error_handling_test.rb'
+    - 'test/unit/strainer_unit_test.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'performance/shopify/paginate.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
+Layout/SpaceBeforeBlockBraces:
+  Exclude:
+    - 'example/server/server.rb'
+    - 'lib/liquid/variable.rb'
+    - 'test/integration/drop_test.rb'
+    - 'test/integration/standard_filter_test.rb'
+    - 'test/integration/tags/if_else_tag_test.rb'
+
+# Offense count: 19
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBrackets.
+# SupportedStyles: space, no_space, compact
+# SupportedStylesForEmptyBrackets: space, no_space
+Layout/SpaceInsideArrayLiteralBrackets:
+  Exclude:
+    - 'test/integration/drop_test.rb'
+    - 'test/integration/standard_filter_test.rb'
+    - 'test/integration/tags/for_tag_test.rb'
+    - 'test/integration/tags/include_tag_test.rb'
+    - 'test/integration/tags/standard_tag_test.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 2
+Lint/AmbiguousOperator:
+  Exclude:
+    - 'test/unit/condition_unit_test.rb'
+
+# Offense count: 16
+# Configuration parameters: AllowSafeAssignment.
+Lint/AssignmentInCondition:
+  Exclude:
+    - 'lib/liquid/block_body.rb'
+    - 'lib/liquid/lexer.rb'
+    - 'lib/liquid/standardfilters.rb'
+    - 'lib/liquid/tags/for.rb'
+    - 'lib/liquid/tags/if.rb'
+    - 'lib/liquid/tags/include.rb'
+    - 'lib/liquid/tags/raw.rb'
+    - 'lib/liquid/variable.rb'
+    - 'performance/profile.rb'
+    - 'test/test_helper.rb'
+    - 'test/unit/tokenizer_unit_test.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: runtime_error, standard_error
+Lint/InheritException:
+  Exclude:
+    - 'lib/liquid/interrupts.rb'
+
+# Offense count: 10
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
+Lint/UnusedBlockArgument:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'lib/liquid/context.rb'
+    - 'lib/liquid/document.rb'
+    - 'lib/liquid/parse_context.rb'
+    - 'lib/liquid/template.rb'
+    - 'performance/shopify/json_filter.rb'
+    - 'test/integration/filter_test.rb'
+    - 'test/integration/render_profiling_test.rb'
+    - 'test/integration/variable_test.rb'
+    - 'test/unit/condition_unit_test.rb'
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods.
+Lint/UnusedMethodArgument:
+  Exclude:
+    - 'example/server/liquid_servlet.rb'
+    - 'test/integration/blank_test.rb'
+    - 'test/integration/error_handling_test.rb'
+    - 'test/integration/filter_test.rb'
+    - 'test/integration/output_test.rb'
+    - 'test/integration/standard_filter_test.rb'
+    - 'test/integration/tags/include_tag_test.rb'
+    - 'test/unit/strainer_unit_test.rb'
+
+# Offense count: 2
+Lint/UselessAssignment:
+  Exclude:
+    - 'performance/shopify/database.rb'
+
+# Offense count: 1
+# Configuration parameters: CheckForMethodsWithNoSideEffects.
+Lint/Void:
+  Exclude:
+    - 'lib/liquid/parse_context.rb'
+
+# Offense count: 95
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 294
+
+# Offense count: 44
+Naming/ConstantName:
+  Exclude:
+    - 'lib/liquid.rb'
+    - 'lib/liquid/block_body.rb'
+    - 'lib/liquid/tags/assign.rb'
+    - 'lib/liquid/tags/capture.rb'
+    - 'lib/liquid/tags/case.rb'
+    - 'lib/liquid/tags/cycle.rb'
+    - 'lib/liquid/tags/for.rb'
+    - 'lib/liquid/tags/if.rb'
+    - 'lib/liquid/tags/include.rb'
+    - 'lib/liquid/tags/raw.rb'
+    - 'lib/liquid/tags/table_row.rb'
+    - 'lib/liquid/variable.rb'
+    - 'performance/shopify/comment_form.rb'
+    - 'performance/shopify/paginate.rb'
+    - 'test/integration/tags/include_tag_test.rb'
+
+# Offense count: 2
+# Configuration parameters: .
+# SupportedStyles: snake_case, camelCase
+Naming/MethodName:
+  EnforcedStyle: snake_case
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Exclude:
+    - 'lib/liquid/i18n.rb'
+    - 'lib/liquid/tags/table_row.rb'
+    - 'lib/liquid/tokenizer.rb'
+
+# Offense count: 40
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: braces, no_braces, context_dependent
+Style/BracesAroundHashParameters:
+  Exclude:
+    - 'test/integration/error_handling_test.rb'
+    - 'test/integration/filter_test.rb'
+    - 'test/integration/render_profiling_test.rb'
+    - 'test/integration/standard_filter_test.rb'
+    - 'test/integration/tags/echo_test.rb'
+    - 'test/integration/tags/increment_tag_test.rb'
+    - 'test/integration/tags/standard_tag_test.rb'
+    - 'test/integration/template_test.rb'
+    - 'test/unit/condition_unit_test.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 5
+Style/ClassVars:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'lib/liquid/strainer.rb'
+    - 'lib/liquid/template.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SingleLineConditionsOnly, IncludeTernaryExpressions.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Exclude:
+    - 'lib/liquid/errors.rb'
+    - 'performance/shopify/shop_filter.rb'
+
+# Offense count: 1
+# Configuration parameters: AllowCoercion.
+Style/DateTime:
+  Exclude:
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/EachWithObject:
+  Exclude:
+    - 'performance/shopify/database.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/EmptyCaseCondition:
+  Exclude:
+    - 'lib/liquid/lexer.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: each, for
+Style/For:
+  Exclude:
+    - 'performance/shopify/shop_filter.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: format, sprintf, percent
+Style/FormatString:
+  Exclude:
+    - 'example/server/example_servlet.rb'
+    - 'performance/shopify/money_filter.rb'
+    - 'performance/shopify/weight_filter.rb'
+    - 'test/integration/filter_test.rb'
+    - 'test/integration/hash_ordering_test.rb'
+
+# Offense count: 115
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+# Offense count: 30
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoreMacros, IgnoredMethods, IncludedMacros, AllowParenthesesInMultilineCall, AllowParenthesesInChaining, AllowParenthesesInCamelCaseMethod, EnforcedStyle.
+# SupportedStyles: require_parentheses, omit_parentheses
+Style/MethodCallWithArgsParentheses:
+  Exclude:
+    - 'Gemfile'
+    - 'Rakefile'
+    - 'lib/liquid/block_body.rb'
+    - 'lib/liquid/parser.rb'
+    - 'lib/liquid/tags/for.rb'
+    - 'liquid.gemspec'
+    - 'performance/shopify/database.rb'
+    - 'performance/shopify/liquid.rb'
+    - 'test/test_helper.rb'
+    - 'test/unit/condition_unit_test.rb'
+    - 'test/unit/tags/if_tag_unit_test.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, MinBodyLength.
+# SupportedStyles: skip_modifier_ifs, always
+Style/Next:
+  Exclude:
+    - 'lib/liquid/tags/for.rb'
+
+# Offense count: 52
+# Cop supports --auto-correct.
+Style/PerlBackrefs:
+  Enabled: false
+
+# Offense count: 33
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: compact, exploded
+Style/RaiseArgs:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/RedundantSelf:
+  Exclude:
+    - 'lib/liquid/strainer.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, AllowInnerSlashes.
+# SupportedStyles: slashes, percent_r, mixed
+Style/RegexpLiteral:
+  Exclude:
+    - 'lib/liquid/file_system.rb'
+    - 'lib/liquid/standardfilters.rb'
+    - 'performance/shopify/shop_filter.rb'
+    - 'test/unit/condition_unit_test.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, Whitelist.
+# Whitelist: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'lib/liquid/drop.rb'
+    - 'lib/liquid/strainer.rb'
+    - 'lib/liquid/tokenizer.rb'
+
+# Offense count: 10
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Exclude:
+    - 'performance/shopify/database.rb'
+    - 'test/integration/error_handling_test.rb'
+    - 'test/integration/template_test.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: use_perl_names, use_english_names
+Style/SpecialGlobalVars:
+  Exclude:
+    - 'performance/shopify/liquid.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiteralsInInterpolation:
+  Exclude:
+    - 'performance/shopify/tag_filter.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, AllowSafeAssignment.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_parentheses_when_complex
+Style/TernaryParentheses:
+  Exclude:
+    - 'lib/liquid/context.rb'
+    - 'lib/liquid/utils.rb'
+
+# Offense count: 21
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, no_comma
+Style/TrailingCommaInArrayLiteral:
+  Exclude:
+    - 'lib/liquid/parse_tree_visitor.rb'
+    - 'lib/liquid/tags/include.rb'
+    - 'test/integration/parse_tree_visitor_test.rb'
+    - 'test/integration/standard_filter_test.rb'
+
+# Offense count: 9
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline.
+# SupportedStylesForMultiline: comma, consistent_comma, no_comma
+Style/TrailingCommaInHashLiteral:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'lib/liquid/lexer.rb'
+    - 'lib/liquid/standardfilters.rb'
+    - 'performance/shopify/comment_form.rb'
+    - 'performance/shopify/database.rb'
+    - 'performance/shopify/paginate.rb'
+    - 'performance/theme_runner.rb'
+    - 'test/integration/output_test.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/UnneededPercentQ:
+  Exclude:
+    - 'test/integration/error_handling_test.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/WhileUntilModifier:
+  Exclude:
+    - 'lib/liquid/tags/case.rb'

.travis.yml

@@ -3,26 +3,24 @@ language: ruby
 rvm:
   - 2.4
   - 2.5
-  - 2.6
+  - &latest_ruby 2.6
   - 2.7
   - ruby-head
   - jruby-head
   - truffleruby
 
-sudo: false
-
-addons:
-  apt:
-    packages:
-    - libgmp3-dev
 
 matrix:
+  include:
+    - rvm: *latest_ruby
+      script: bundle exec rake memory_profile:run
+      name: Profiling Memory Usage
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
+    - rvm: truffleruby
 
-install:
-  - bundle install
+cache: bundler
 
 script: bundle exec rake
 

Gemfile

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 source 'https://rubygems.org'
 git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
@@ -10,6 +8,7 @@ gemspec
 group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'
+  gem 'terminal-table'
 
   install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ && RUBY_ENGINE != 'truffleruby' } do
     gem 'stackprof'
@@ -21,6 +20,6 @@ group :test do
   gem 'rubocop-performance', require: false
 
   platform :mri, :truffleruby do
-    gem 'liquid-c', github: 'Shopify/liquid-c', ref: '7ba926791ef8411984d0f3e41c6353fd716041c6'
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'liquid-tag'
   end
 end

History.md

@@ -274,7 +274,7 @@ Yanked from rubygems, as it contained too many changes that broke compatibility.
 * Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the filter which was obviously misleading [Tobias Luetke]
 * Removed count helper from standard lib. use size [Tobias Luetke]
 * Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
-* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ARGUMENT_SEPARATOR: , by default [Paul Hammond]
+* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
     {{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
 * Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke]
 

Rakefile

@@ -1,20 +1,18 @@
-# frozen_string_literal: true
-
 require 'rake'
 require 'rake/testtask'
-$LOAD_PATH.unshift(File.expand_path('lib', __dir__))
-require 'liquid/version'
+$LOAD_PATH.unshift File.expand_path("../lib", __FILE__)
+require "liquid/version"
 
-task(default: %i[test rubocop])
+task default: [:test, :rubocop]
 
-desc('run test suite with default parser')
+desc 'run test suite with default parser'
 Rake::TestTask.new(:base_test) do |t|
   t.libs << '.' << 'lib' << 'test'
   t.test_files = FileList['test/{integration,unit}/**/*_test.rb']
   t.verbose = false
 end
 
-desc('run test suite with warn error mode')
+desc 'run test suite with warn error mode'
 task :warn_test do
   ENV['LIQUID_PARSER_MODE'] = 'warn'
   Rake::Task['base_test'].invoke
@@ -27,7 +25,7 @@ task :rubocop do
   end
 end
 
-desc('runs test suite with both strict and lax parsers')
+desc 'runs test suite with both strict and lax parsers'
 task :test do
   ENV['LIQUID_PARSER_MODE'] = 'lax'
   Rake::Task['base_test'].invoke
@@ -37,7 +35,6 @@ task :test do
   Rake::Task['base_test'].invoke
 
   if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
-
     ENV['LIQUID_C'] = '1'
 
     ENV['LIQUID_PARSER_MODE'] = 'lax'
@@ -50,9 +47,9 @@ task :test do
   end
 end
 
-task(gem: :build)
+task gem: :build
 task :build do
-  system 'gem build liquid.gemspec'
+  system "gem build liquid.gemspec"
 end
 
 task install: :build do
@@ -61,45 +58,45 @@ end
 
 task release: :build do
   system "git tag -a v#{Liquid::VERSION} -m 'Tagging #{Liquid::VERSION}'"
-  system 'git push --tags'
+  system "git push --tags"
   system "gem push liquid-#{Liquid::VERSION}.gem"
   system "rm liquid-#{Liquid::VERSION}.gem"
 end
 
 namespace :benchmark do
-  desc 'Run the liquid benchmark with lax parsing'
+  desc "Run the liquid benchmark with lax parsing"
   task :run do
-    ruby './performance/benchmark.rb lax'
+    ruby "./performance/benchmark.rb lax"
   end
 
-  desc 'Run the liquid benchmark with strict parsing'
+  desc "Run the liquid benchmark with strict parsing"
   task :strict do
-    ruby './performance/benchmark.rb strict'
+    ruby "./performance/benchmark.rb strict"
   end
 end
 
 namespace :profile do
-  desc 'Run the liquid profile/performance coverage'
+  desc "Run the liquid profile/performance coverage"
   task :run do
-    ruby './performance/profile.rb'
+    ruby "./performance/profile.rb"
   end
 
-  desc 'Run the liquid profile/performance coverage with strict parsing'
+  desc "Run the liquid profile/performance coverage with strict parsing"
   task :strict do
-    ruby './performance/profile.rb strict'
+    ruby "./performance/profile.rb strict"
   end
 end
 
 namespace :memory_profile do
-  desc 'Run memory profiler'
+  desc "Run memory profiler"
   task :run do
-    ruby './performance/memory_profile.rb'
+    ruby "./performance/memory_profile.rb"
   end
 end
 
-desc('Run example')
+desc "Run example"
 task :example do
-  ruby '-w -d -Ilib example/server/server.rb'
+  ruby "-w -d -Ilib example/server/server.rb"
 end
 
 task :console do

example/server/example_servlet.rb

@@ -1,8 +1,6 @@
-# frozen_string_literal: true
-
 module ProductsFilter
   def price(integer)
-    format('$%.2d USD', integer / 100.0)
+    sprintf("$%.2d USD", integer / 100.0)
   end
 
   def prettyprint(text)
@@ -30,17 +28,17 @@ class Servlet < LiquidServlet
   private
 
   def products_list
-    [{ 'name' => 'Arbor Draft', 'price' => 39_900, 'description' => 'the *arbor draft* is a excellent product' },
-     { 'name' => 'Arbor Element', 'price' => 40_000, 'description' => 'the *arbor element* rocks for freestyling' },
-     { 'name' => 'Arbor Diamond', 'price' => 59_900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }]
+    [{ 'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
+     { 'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling' },
+     { 'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }]
   end
 
   def more_products_list
-    [{ 'name' => 'Arbor Catalyst', 'price' => 39_900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
-     { 'name' => 'Arbor Fish', 'price' => 40_000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
+    [{ 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
+     { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
   end
 
   def description
-    'List of Products ~ This is a list of products with price and description.'
+    "List of Products ~ This is a list of products with price and description."
   end
 end

example/server/liquid_servlet.rb

@@ -1,28 +1,23 @@
-# frozen_string_literal: true
-
 class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
-  def get(req, res)
+  def do_GET(req, res)
     handle(:get, req, res)
   end
 
-  def post(req, res)
+  def do_POST(req, res)
     handle(:post, req, res)
   end
 
-  alias_method :do_GET, :get
-  alias_method :do_POST, :post
-
   private
 
-  def handle(_type, req, res)
+  def handle(type, req, res)
     @request = req
     @response = res
 
     @request.path_info =~ /(\w+)\z/
-    @action = Regexp.last_match(1) || 'index'
+    @action = $1 || 'index'
     @assigns = send(@action) if respond_to?(@action)
 
-    @response['Content-Type'] = 'text/html'
+    @response['Content-Type'] = "text/html"
     @response.status = 200
     @response.body = Liquid::Template.parse(read_template).render(@assigns, filters: [ProductsFilter])
   end

example/server/server.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'webrick'
 require 'rexml/document'
 
@@ -10,5 +8,5 @@ require_relative 'example_servlet'
 # Setup webrick
 server = WEBrick::HTTPServer.new(Port: ARGV[1] || 3000)
 server.mount('/', Servlet)
-trap('INT') { server.shutdown }
+trap("INT"){ server.shutdown }
 server.start

lib/liquid.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 # Copyright (c) 2005 Tobias Luetke
 #
 # Permission is hereby granted, free of charge, to any person obtaining
@@ -22,31 +20,31 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 module Liquid
-  FILTER_SEPARATOR = /\|/.freeze
-  ARGUMENT_SEPARATOR = ','
-  FILTER_ARGUMENT_SEPARATOR = ':'
-  VARIABLE_ATTRIBUTE_SEPARATOR = '.'
-  WHITESPACE_CONTROL = '-'
-  TAG_START = /\{\%/.freeze
-  TAG_END = /\%\}/.freeze
-  VARIABLE_SIGNATURE = /\(?[\w\-\.\[\]]\)?/.freeze
-  VARIABLE_SEGMENT = /[\w\-]/.freeze
-  VARIABLE_START = /\{\{/.freeze
-  VARIABLE_END = /\}\}/.freeze
-  VARIABLE_INCOMPLETE_END = /\}\}?/.freeze
-  QUOTED_STRING = /"[^"]*"|'[^']*'/.freeze
-  QUOTED_FRAGMENT = /#{QUOTED_STRING}|(?:[^\s,\|'"]|#{QUOTED_STRING})+/o.freeze
-  TAG_ATTRIBUTES = /(\w+)\s*\:\s*(#{QUOTED_FRAGMENT})/o.freeze
-  ANY_STARTING_TAG = /#{TAG_START}|#{VARIABLE_START}/o.freeze
-  PARTIAL_TEMPLATE_PARSER = /#{TAG_START}.*?#{TAG_END}|#{VARIABLE_START}.*?#{VARIABLE_INCOMPLETE_END}/om.freeze
-  TEMPLATE_PARSER = /(#{PARTIAL_TEMPLATE_PARSER}|#{ANY_STARTING_TAG})/om.freeze
-  VARIABLE_PARSER = /\[[^\]]+\]|#{VARIABLE_SEGMENT}+\??/o.freeze
+  FilterSeparator             = /\|/
+  ArgumentSeparator           = ','.freeze
+  FilterArgumentSeparator     = ':'.freeze
+  VariableAttributeSeparator  = '.'.freeze
+  WhitespaceControl           = '-'.freeze
+  TagStart                    = /\{\%/
+  TagEnd                      = /\%\}/
+  VariableSignature           = /\(?[\w\-\.\[\]]\)?/
+  VariableSegment             = /[\w\-]/
+  VariableStart               = /\{\{/
+  VariableEnd                 = /\}\}/
+  VariableIncompleteEnd       = /\}\}?/
+  QuotedString                = /"[^"]*"|'[^']*'/
+  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
+  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
+  AnyStartingTag              = /#{TagStart}|#{VariableStart}/o
+  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
+  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
+  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
 
   singleton_class.send(:attr_accessor, :cache_classes)
   self.cache_classes = true
 end
 
-require 'liquid/version'
+require "liquid/version"
 require 'liquid/parse_tree_visitor'
 require 'liquid/lexer'
 require 'liquid/parser'

lib/liquid/block.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Block < Tag
     MAX_DEPTH = 100
@@ -29,16 +27,16 @@ module Liquid
     end
 
     def unknown_tag(tag, _params, _tokens)
-      if tag == 'else'
-        raise SyntaxError, parse_context.locale.t('errors.syntax.unexpected_else',
-                                                  block_name: block_name)
-      elsif tag.start_with?('end')
-        raise SyntaxError, parse_context.locale.t('errors.syntax.invalid_delimiter',
-                                                  tag: tag,
-                                                  block_name: block_name,
-                                                  block_delimiter: block_delimiter)
+      if tag == 'else'.freeze
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unexpected_else".freeze,
+          block_name: block_name))
+      elsif tag.start_with?('end'.freeze)
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.invalid_delimiter".freeze,
+          tag: tag,
+          block_name: block_name,
+          block_delimiter: block_delimiter))
       else
-        raise SyntaxError, parse_context.locale.t('errors.syntax.unknown_tag', tag: tag)
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unknown_tag".freeze, tag: tag))
       end
     end
 
@@ -53,15 +51,18 @@ module Liquid
     protected
 
     def parse_body(body, tokens)
-      raise StackLevelError, 'Nesting too deep' if parse_context.depth >= MAX_DEPTH
-
+      if parse_context.depth >= MAX_DEPTH
+        raise StackLevelError, "Nesting too deep".freeze
+      end
       parse_context.depth += 1
       begin
         body.parse(tokens, parse_context) do |end_tag_name, end_tag_params|
           @blank &&= body.blank?
 
           return false if end_tag_name == block_delimiter
-          raise SyntaxError, parse_context.locale.t('errors.syntax.tag_never_closed', block_name: block_name) unless end_tag_name
+          unless end_tag_name
+            raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
+          end
 
           # this tag is not registered with the system
           # pass it to the current block for special handling or error reporting

lib/liquid/block_body.rb

@@ -1,12 +1,11 @@
-# frozen_string_literal: true
-
 module Liquid
   class BlockBody
-    FULL_TOKEN = /\A#{TAG_START}#{WHITESPACE_CONTROL}?\s*(\w+)\s*(.*?)#{WHITESPACE_CONTROL}?#{TAG_END}\z/om.freeze
-    CONTENT_OF_VARIABLE = /\A#{VARIABLE_START}#{WHITESPACE_CONTROL}?(.*?)#{WHITESPACE_CONTROL}?#{VARIABLE_END}\z/om.freeze
-    WHITESPACE_OR_NOTHING = /\A\s*\z/.freeze
-    TAG_START = '{%'
-    VAR_START = '{{'
+    LiquidTagToken = /\A\s*(\w+)\s*(.*?)\z/o
+    FullToken = /\A#{TagStart}#{WhitespaceControl}?(\s*)(\w+)(\s*)(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
+    ContentOfVariable = /\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
+    WhitespaceOrNothing = /\A\s*\z/
+    TAGSTART = "{%".freeze
+    VARSTART = "{{".freeze
 
     attr_reader :nodelist
 
@@ -15,36 +14,83 @@ module Liquid
       @blank = true
     end
 
-    def parse(tokenizer, parse_context)
+    def parse(tokenizer, parse_context, &block)
       parse_context.line_number = tokenizer.line_number
-      while (token = tokenizer.shift)
-        next if token.empty?
 
-        case
-        when token.start_with?(TAG_START)
-          whitespace_handler(token, parse_context)
-          raise_missing_tag_terminator(token, parse_context) unless token =~ FULL_TOKEN
-          tag_name = Regexp.last_match(1)
-          markup = Regexp.last_match(2)
-          # fetch the tag from registered blocks
-          unless (tag = registered_tags[tag_name])
+      if tokenizer.for_liquid_tag
+        parse_for_liquid_tag(tokenizer, parse_context, &block)
+      else
+        parse_for_document(tokenizer, parse_context, &block)
+      end
+    end
+
+    private def parse_for_liquid_tag(tokenizer, parse_context)
+      while token = tokenizer.shift
+        unless token.empty? || token =~ WhitespaceOrNothing
+          unless token =~ LiquidTagToken
+            # line isn't empty but didn't match tag syntax, yield and let the
+            # caller raise a syntax error
+            return yield token, token
+          end
+          tag_name = $1
+          markup = $2
+          unless tag = registered_tags[tag_name]
             # end parsing if we reach an unknown tag and let the caller decide
             # determine how to proceed
             return yield tag_name, markup
           end
-
           new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
           @blank &&= new_tag.blank?
           @nodelist << new_tag
-        when token.start_with?(VAR_START)
+        end
+        parse_context.line_number = tokenizer.line_number
+      end
+
+      yield nil, nil
+    end
+
+    private def parse_for_document(tokenizer, parse_context, &block)
+      while token = tokenizer.shift
+        next if token.empty?
+        case
+        when token.start_with?(TAGSTART)
+          whitespace_handler(token, parse_context)
+          unless token =~ FullToken
+            raise_missing_tag_terminator(token, parse_context)
+          end
+          tag_name = $2
+          markup = $4
+
+          if parse_context.line_number
+            # newlines inside the tag should increase the line number,
+            # particularly important for multiline {% liquid %} tags
+            parse_context.line_number += $1.count("\n".freeze) + $3.count("\n".freeze)
+          end
+
+          if tag_name == 'liquid'.freeze
+            liquid_tag_tokenizer = Tokenizer.new(markup, line_number: parse_context.line_number, for_liquid_tag: true)
+            next parse_for_liquid_tag(liquid_tag_tokenizer, parse_context, &block)
+          end
+
+          unless tag = registered_tags[tag_name]
+            # end parsing if we reach an unknown tag and let the caller decide
+            # determine how to proceed
+            return yield tag_name, markup
+          end
+          new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
+          @blank &&= new_tag.blank?
+          @nodelist << new_tag
+        when token.start_with?(VARSTART)
           whitespace_handler(token, parse_context)
           @nodelist << create_variable(token, parse_context)
           @blank = false
         else
-          token.lstrip! if parse_context.trim_whitespace
+          if parse_context.trim_whitespace
+            token.lstrip!
+          end
           parse_context.trim_whitespace = false
           @nodelist << token
-          @blank &&= token.match?(WHITESPACE_OR_NOTHING)
+          @blank &&= !!(token =~ WhitespaceOrNothing)
         end
         parse_context.line_number = tokenizer.line_number
       end
@@ -53,11 +99,13 @@ module Liquid
     end
 
     def whitespace_handler(token, parse_context)
-      if token[2] == WHITESPACE_CONTROL
+      if token[2] == WhitespaceControl
         previous_token = @nodelist.last
-        previous_token.rstrip! if previous_token.is_a?(String)
+        if previous_token.is_a? String
+          previous_token.rstrip!
+        end
       end
-      parse_context.trim_whitespace = (token[-3] == WHITESPACE_CONTROL)
+      parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
     end
 
     def blank?
@@ -65,14 +113,14 @@ module Liquid
     end
 
     def render(context)
-      render_to_output_buffer(context, +'')
+      render_to_output_buffer(context, '')
     end
 
     def render_to_output_buffer(context, output)
       context.resource_limits.render_score += @nodelist.length
 
       idx = 0
-      while (node = @nodelist[idx])
+      while node = @nodelist[idx]
         previous_output_size = output.bytesize
 
         case node
@@ -81,7 +129,7 @@ module Liquid
         when Variable
           render_node(context, output, node)
         when Block
-          render_node(context, node.blank? ? +'' : output, node)
+          render_node(context, node.blank? ? '' : output, node)
           break if context.interrupt? # might have happened in a for-block
         when Continue, Break
           # If we get an Interrupt that means the block must stop processing. An
@@ -115,12 +163,11 @@ module Liquid
     def raise_if_resource_limits_reached(context, length)
       context.resource_limits.render_length += length
       return unless context.resource_limits.reached?
-
-      raise MemoryError, 'Memory limits exceeded'
+      raise MemoryError.new("Memory limits exceeded".freeze)
     end
 
     def create_variable(token, parse_context)
-      token.scan(CONTENT_OF_VARIABLE) do |content|
+      token.scan(ContentOfVariable) do |content|
         markup = content.first
         return Variable.new(markup, parse_context)
       end
@@ -128,11 +175,11 @@ module Liquid
     end
 
     def raise_missing_tag_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_termination', token: token, tag_end: TAG_END.inspect)
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_termination".freeze, token: token, tag_end: TagEnd.inspect))
     end
 
     def raise_missing_variable_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t('errors.syntax.variable_termination', token: token, tag_end: VARIABLE_END.inspect)
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.variable_termination".freeze, token: token, tag_end: VariableEnd.inspect))
     end
 
     def registered_tags

lib/liquid/condition.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Container for liquid nodes which conveniently wraps decision making logic
   #
@@ -9,26 +7,26 @@ module Liquid
   #   c.evaluate #=> true
   #
   class Condition #:nodoc:
-    @operators = {
-      '==' => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
-      '!=' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
-      '<>' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
-      '<' => :<,
-      '>' => :>,
-      '>=' => :>=,
-      '<=' => :<=,
-      'contains' => lambda do |_cond, left, right|
+    @@operators = {
+      '=='.freeze => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
+      '!='.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
+      '<>'.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
+      '<'.freeze  => :<,
+      '>'.freeze  => :>,
+      '>='.freeze => :>=,
+      '<='.freeze => :<=,
+      'contains'.freeze => lambda do |cond, left, right|
         if left && right && left.respond_to?(:include?)
           right = right.to_s if left.is_a?(String)
           left.include?(right)
         else
           false
         end
-      end,
+      end
     }
 
-    class << self
-      attr_accessor :operators
+    def self.operators
+      @@operators
     end
 
     attr_reader :attachment, :child_condition
@@ -38,7 +36,7 @@ module Liquid
       @left = left
       @operator = operator
       @right = right
-      @child_relation = nil
+      @child_relation  = nil
       @child_condition = nil
     end
 
@@ -80,7 +78,7 @@ module Liquid
     end
 
     def inspect
-      "#<Condition #{[@left, @operator, @right].compact.join(' ')}>"
+      "#<Condition #{[@left, @operator, @right].compact.join(' '.freeze)}>"
     end
 
     protected
@@ -118,7 +116,7 @@ module Liquid
       left = context.evaluate(left)
       right = context.evaluate(right)
 
-      operation = self.class.operators[op] || raise(Liquid::ArgumentError, "Unknown operator #{op}")
+      operation = self.class.operators[op] || raise(Liquid::ArgumentError.new("Unknown operator #{op}"))
 
       if operation.respond_to?(:call)
         operation.call(self, left, right)
@@ -126,7 +124,7 @@ module Liquid
         begin
           left.send(operation, right)
         rescue ::ArgumentError => e
-          raise Liquid::ArgumentError, e.message
+          raise Liquid::ArgumentError.new(e.message)
         end
       end
     end

lib/liquid/context.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Context keeps the variable stack and resolves variables, as well as keywords
   #
@@ -30,7 +28,9 @@ module Liquid
       @this_stack_used = false
 
       self.exception_renderer = Template.default_exception_renderer
-      self.exception_renderer = ->(_e) { raise } if rethrow_errors
+      if rethrow_errors
+        self.exception_renderer = ->(e) { raise }
+      end
 
       @interrupts = []
       @filters = []
@@ -89,7 +89,7 @@ module Liquid
     # Push new local scope on the stack. use <tt>Context#stack</tt> instead
     def push(new_scope = {})
       @scopes.unshift(new_scope)
-      raise StackLevelError, 'Nesting too deep' if @scopes.length > Block::MAX_DEPTH
+      raise StackLevelError, "Nesting too deep".freeze if @scopes.length > Block::MAX_DEPTH
     end
 
     # Merge a hash of variables in the current local scope
@@ -100,7 +100,6 @@ module Liquid
     # Pop from the stack. use <tt>Context#stack</tt> instead
     def pop
       raise ContextError if @scopes.size == 1
-
       @scopes.shift
     end
 
@@ -191,12 +190,14 @@ module Liquid
     end
 
     def lookup_and_evaluate(obj, key, raise_on_not_found: true)
-      raise Liquid::UndefinedVariable, "undefined variable #{key}" if @strict_variables && raise_on_not_found && obj.respond_to?(:key?) && !obj.key?(key)
+      if @strict_variables && raise_on_not_found && obj.respond_to?(:key?) && !obj.key?(key)
+        raise Liquid::UndefinedVariable, "undefined variable #{key}"
+      end
 
       value = obj[key]
 
       if value.is_a?(Proc) && obj.respond_to?(:[]=)
-        obj[key] = value.arity == 0 ? value.call : value.call(self)
+        obj[key] = (value.arity == 0) ? value.call : value.call(self)
       else
         value
       end
@@ -207,8 +208,8 @@ module Liquid
     def internal_error
       # raise and catch to set backtrace and cause on exception
       raise Liquid::InternalError, 'internal'
-    rescue Liquid::InternalError => e
-      e
+    rescue Liquid::InternalError => exc
+      exc
     end
 
     def squash_instance_assigns_with_environments

lib/liquid/document.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Document < BlockBody
     def self.parse(tokens, parse_context)
@@ -9,7 +7,7 @@ module Liquid
     end
 
     def parse(tokens, parse_context)
-      super do |end_tag_name, _end_tag_params|
+      super do |end_tag_name, end_tag_params|
         unknown_tag(end_tag_name, parse_context) if end_tag_name
       end
     rescue SyntaxError => e
@@ -19,10 +17,10 @@ module Liquid
 
     def unknown_tag(tag, parse_context)
       case tag
-      when 'else', 'end'
-        raise SyntaxError, parse_context.locale.t('errors.syntax.unexpected_outer_tag', tag: tag)
+      when 'else'.freeze, 'end'.freeze
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unexpected_outer_tag".freeze, tag: tag))
       else
-        raise SyntaxError, parse_context.locale.t('errors.syntax.unknown_tag', tag: tag)
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unknown_tag".freeze, tag: tag))
       end
     end
   end

lib/liquid/drop.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'set'
 
 module Liquid
@@ -27,8 +25,7 @@ module Liquid
 
     # Catch all for the method
     def liquid_method_missing(method)
-      return nil unless @context&.strict_variables
-
+      return nil unless @context && @context.strict_variables
       raise Liquid::UndefinedDropMethod, "undefined method #{method}"
     end
 
@@ -70,7 +67,7 @@ module Liquid
 
         if include?(Enumerable)
           blacklist += Enumerable.public_instance_methods
-          blacklist -= %i[sort count first min max include?]
+          blacklist -= [:sort, :count, :first, :min, :max, :include?]
         end
 
         whitelist = [:to_liquid] + (public_instance_methods - blacklist)

lib/liquid/errors.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Error < ::StandardError
     attr_accessor :line_number
@@ -7,12 +5,12 @@ module Liquid
     attr_accessor :markup_context
 
     def to_s(with_prefix = true)
-      str = +''
+      str = ""
       str << message_prefix if with_prefix
       str << super()
 
       if markup_context
-        str << ' '
+        str << " "
         str << markup_context
       end
 
@@ -22,20 +20,20 @@ module Liquid
     private
 
     def message_prefix
-      str = +''
-      str << if is_a?(SyntaxError)
-        'Liquid syntax error'
+      str = ""
+      if is_a?(SyntaxError)
+        str << "Liquid syntax error"
       else
-        'Liquid error'
+        str << "Liquid error"
       end
 
       if line_number
-        str << ' ('
-        str << template_name << ' ' if template_name
-        str << 'line ' << line_number.to_s << ')'
+        str << " ("
+        str << template_name << " " if template_name
+        str << "line " << line_number.to_s << ")"
       end
 
-      str << ': '
+      str << ": "
       str
     end
   end

lib/liquid/expression.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Expression
     class MethodLiteral
@@ -16,18 +14,18 @@ module Liquid
     end
 
     LITERALS = {
-      nil => nil, 'nil' => nil, 'null' => nil, '' => nil,
-      'true' => true,
-      'false' => false,
-      'blank' => MethodLiteral.new(:blank?, '').freeze,
-      'empty' => MethodLiteral.new(:empty?, '').freeze
+      nil => nil, 'nil'.freeze => nil, 'null'.freeze => nil, ''.freeze => nil,
+      'true'.freeze  => true,
+      'false'.freeze => false,
+      'blank'.freeze => MethodLiteral.new(:blank?, '').freeze,
+      'empty'.freeze => MethodLiteral.new(:empty?, '').freeze
     }.freeze
 
-    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m.freeze
-    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m.freeze
-    INTEGERS_REGEX       = /\A(-?\d+)\z/.freeze
-    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/.freeze
-    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/.freeze
+    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m
+    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m
+    INTEGERS_REGEX       = /\A(-?\d+)\z/
+    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/
+    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/
 
     def self.parse(markup)
       if LITERALS.key?(markup)
@@ -35,13 +33,13 @@ module Liquid
       else
         case markup
         when SINGLE_QUOTED_STRING, DOUBLE_QUOTED_STRING
-          Regexp.last_match(1)
+          $1
         when INTEGERS_REGEX
-          Regexp.last_match(1).to_i
+          $1.to_i
         when RANGES_REGEX
-          RangeLookup.parse(Regexp.last_match(1), Regexp.last_match(2))
+          RangeLookup.parse($1, $2)
         when FLOATS_REGEX
-          Regexp.last_match(1).to_f
+          $1.to_f
         else
           VariableLookup.parse(markup)
         end

lib/liquid/extensions.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'time'
 require 'date'
 

lib/liquid/file_system.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # A Liquid file system is a way to let your templates retrieve other templates for use with the include tag.
   #
@@ -17,7 +15,7 @@ module Liquid
   class BlankFileSystem
     # Called by Liquid to retrieve a template file
     def read_template_file(_template_path)
-      raise FileSystemError, 'This liquid context does not allow includes.'
+      raise FileSystemError, "This liquid context does not allow includes."
     end
   end
 
@@ -46,7 +44,7 @@ module Liquid
   class LocalFileSystem
     attr_accessor :root
 
-    def initialize(root, pattern = '_%s.liquid')
+    def initialize(root, pattern = "_%s.liquid".freeze)
       @root = root
       @pattern = pattern
     end
@@ -59,9 +57,9 @@ module Liquid
     end
 
     def full_path(template_path)
-      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ %r{\A[^./][a-zA-Z0-9_/]+\z}
+      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ /\A[^.\/][a-zA-Z0-9_\/]+\z/
 
-      full_path = if template_path.include?('/')
+      full_path = if template_path.include?('/'.freeze)
         File.join(root, File.dirname(template_path), @pattern % File.basename(template_path))
       else
         File.join(root, @pattern % template_path)

lib/liquid/forloop_drop.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class ForloopDrop < Drop
     def initialize(name, length, parentloop)

lib/liquid/i18n.rb

@@ -1,10 +1,8 @@
-# frozen_string_literal: true
-
 require 'yaml'
 
 module Liquid
   class I18n
-    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), 'locales', 'en.yml')
+    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), "locales", "en.yml")
 
     TranslationError = Class.new(StandardError)
 
@@ -28,13 +26,13 @@ module Liquid
     def interpolate(name, vars)
       name.gsub(/%\{(\w+)\}/) do
         # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]
-        (vars[Regexp.last_match(1).to_sym]).to_s
+        (vars[$1.to_sym]).to_s
       end
     end
 
     def deep_fetch_translation(name)
-      name.split('.').reduce(locale) do |level, cur|
-        level[cur] || raise(TranslationError, "Translation for #{name} does not exist in locale #{path}")
+      name.split('.'.freeze).reduce(locale) do |level, cur|
+        level[cur] or raise TranslationError, "Translation for #{name} does not exist in locale #{path}"
       end
     end
   end

lib/liquid/interrupts.rb

@@ -1,18 +1,16 @@
-# frozen_string_literal: true
-
 module Liquid
   # An interrupt is any command that breaks processing of a block (ex: a for loop).
   class Interrupt
     attr_reader :message
 
     def initialize(message = nil)
-      @message = message || 'interrupt'
+      @message = message || "interrupt".freeze
     end
   end
 
   # Interrupt that is thrown whenever a {% break %} is called.
-  class BreakInterrupt < RuntimeError; end
+  class BreakInterrupt < Interrupt; end
 
   # Interrupt that is thrown whenever a {% continue %} is called.
-  class ContinueInterrupt < RuntimeError; end
+  class ContinueInterrupt < Interrupt; end
 end

lib/liquid/legacy.rb

@@ -1,79 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  FilterSeparator = FILTER_SEPARATOR
-  ArgumentSeparator = ARGUMENT_SEPARATOR
-  FilterArgumentSeparator = FILTER_ARGUMENT_SEPARATOR
-  VariableAttributeSeparator = VARIABLE_ATTRIBUTE_SEPARATOR
-  WhitespaceControl = WHITESPACE_CONTROL
-  TagStart = TAG_START
-  TagEnd = TAG_END
-  VariableSignature = VARIABLE_SIGNATURE
-  VariableSegment = VARIABLE_SEGMENT
-  VariableStart = VARIABLE_START
-  VariableEnd = VARIABLE_END
-  VariableIncompleteEnd = VARIABLE_INCOMPLETE_END
-  QuotedString = QUOTED_STRING
-  QuotedFragment = QUOTED_FRAGMENT
-  TagAttributes = TAG_ATTRIBUTES
-  AnyStartingTag = ANY_STARTING_TAG
-  PartialTemplateParser = PARTIAL_TEMPLATE_PARSER
-  TemplateParser = TEMPLATE_PARSER
-  VariableParser = VARIABLE_PARSER
-
-  class BlockBody
-    FullToken = FULL_TOKEN
-    ContentOfVariable = CONTENT_OF_VARIABLE
-    WhitespaceOrNothing = WHITESPACE_OR_NOTHING
-    TAGSTART = TAG_START
-    VARSTART = VAR_START
-  end
-
-  class Assign < Tag
-    Syntax = SYNTAX
-  end
-
-  class Capture < Block
-    Syntax = SYNTAX
-  end
-
-  class Case < Block
-    Syntax     = SYNTAX
-    WhenSyntax = WHEN_SYNTAX
-  end
-
-  class Cycle < Tag
-    SimpleSyntax = SIMPLE_SYNTAX
-    NamedSyntax  = NAMED_SYNTAX
-  end
-
-  class For < Block
-    Syntax = SYNTAX
-  end
-
-  class If < Block
-    Syntax = SYNTAX
-    ExpressionsAndOperators = EXPRESSIONS_AND_OPERATORS
-  end
-
-  class Include < Tag
-    Syntax = SYNTAX
-  end
-
-  class Raw < Block
-    Syntax = SYNTAX
-    FullTokenPossiblyInvalid = FULL_TOKEN_POSSIBLY_INVALID
-  end
-
-  class TableRow < Block
-    Syntax = SYNTAX
-  end
-
-  class Variable
-    FilterMarkupRegex = FILTER_MARKUP_REGEX
-    FilterParser = FILTER_PARSER
-    FilterArgsRegex = FILTER_ARGS_REGEX
-    JustTagAttributes = JUST_TAG_ATTRIBUTES
-    MarkupWithQuotedFragment = MARKUP_WITH_QUOTED_FRAGMENT
-  end
-end

lib/liquid/lexer.rb

@@ -1,27 +1,25 @@
-# frozen_string_literal: true
-
-require 'strscan'
+require "strscan"
 module Liquid
   class Lexer
     SPECIALS = {
-      '|' => :pipe,
-      '.' => :dot,
-      ':' => :colon,
-      ',' => :comma,
-      '[' => :open_square,
-      ']' => :close_square,
-      '(' => :open_round,
-      ')' => :close_round,
-      '?' => :question,
-      '-' => :dash,
+      '|'.freeze => :pipe,
+      '.'.freeze => :dot,
+      ':'.freeze => :colon,
+      ','.freeze => :comma,
+      '['.freeze => :open_square,
+      ']'.freeze => :close_square,
+      '('.freeze => :open_round,
+      ')'.freeze => :close_round,
+      '?'.freeze => :question,
+      '-'.freeze => :dash
     }.freeze
-    IDENTIFIER = /[a-zA-Z_][\w-]*\??/.freeze
-    SINGLE_STRING_LITERAL = /'[^\']*'/.freeze
-    DOUBLE_STRING_LITERAL = /"[^\"]*"/.freeze
-    NUMBER_LITERAL = /-?\d+(\.\d+)?/.freeze
-    DOTDOT = /\.\./.freeze
-    COMPARISON_OPERATOR = /==|!=|<>|<=?|>=?|contains(?=\s)/.freeze
-    WHITESPACE_OR_NOTHING = /\s*/.freeze
+    IDENTIFIER = /[a-zA-Z_][\w-]*\??/
+    SINGLE_STRING_LITERAL = /'[^\']*'/
+    DOUBLE_STRING_LITERAL = /"[^\"]*"/
+    NUMBER_LITERAL = /-?\d+(\.\d+)?/
+    DOTDOT = /\.\./
+    COMPARISON_OPERATOR = /==|!=|<>|<=?|>=?|contains(?=\s)/
+    WHITESPACE_OR_NOTHING = /\s*/
 
     def initialize(input)
       @ss = StringScanner.new(input)
@@ -33,16 +31,16 @@ module Liquid
       until @ss.eos?
         @ss.skip(WHITESPACE_OR_NOTHING)
         break if @ss.eos?
-
-        tok = if (t = @ss.scan(COMPARISON_OPERATOR)) then [:comparison, t]
-        elsif (t = @ss.scan(SINGLE_STRING_LITERAL)) then [:string, t]
-        elsif (t = @ss.scan(DOUBLE_STRING_LITERAL)) then [:string, t]
-        elsif (t = @ss.scan(NUMBER_LITERAL)) then [:number, t]
-        elsif (t = @ss.scan(IDENTIFIER)) then [:id, t]
-        elsif (t = @ss.scan(DOTDOT)) then [:dotdot, t]
+        tok = case
+        when t = @ss.scan(COMPARISON_OPERATOR) then [:comparison, t]
+        when t = @ss.scan(SINGLE_STRING_LITERAL) then [:string, t]
+        when t = @ss.scan(DOUBLE_STRING_LITERAL) then [:string, t]
+        when t = @ss.scan(NUMBER_LITERAL) then [:number, t]
+        when t = @ss.scan(IDENTIFIER) then [:id, t]
+        when t = @ss.scan(DOTDOT) then [:dotdot, t]
         else
           c = @ss.getch
-          if (s = SPECIALS[c])
+          if s = SPECIALS[c]
             [s, c]
           else
             raise SyntaxError, "Unexpected character #{c}"

lib/liquid/parse_context.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class ParseContext
     attr_accessor :locale, :line_number, :trim_whitespace, :depth
@@ -21,6 +19,7 @@ module Liquid
       @partial = value
       @options = value ? partial_options : @template_options
       @error_mode = @options[:error_mode] || Template.error_mode
+      value
     end
 
     def partial_options
@@ -29,7 +28,7 @@ module Liquid
         if dont_pass == true
           { locale: locale }
         elsif dont_pass.is_a?(Array)
-          @template_options.reject { |k, _v| dont_pass.include?(k) }
+          @template_options.reject { |k, v| dont_pass.include?(k) }
         else
           @template_options
         end

lib/liquid/parse_tree_visitor.rb

@@ -28,7 +28,7 @@ module Liquid
         item, new_context = @callbacks[node.class].call(node, context)
         [
           item,
-          ParseTreeVisitor.for(node, @callbacks).visit(new_context || context),
+          ParseTreeVisitor.for(node, @callbacks).visit(new_context || context)
         ]
       end
     end

lib/liquid/parser.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Parser
     def initialize(input)
@@ -14,8 +12,9 @@ module Liquid
 
     def consume(type = nil)
       token = @tokens[@p]
-      raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}" if type && token[0] != type
-
+      if type && token[0] != type
+        raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}"
+      end
       @p += 1
       token[1]
     end
@@ -26,7 +25,6 @@ module Liquid
     def consume?(type)
       token = @tokens[@p]
       return false unless token && token[0] == type
-
       @p += 1
       token[1]
     end
@@ -36,7 +34,6 @@ module Liquid
       token = @tokens[@p]
       return false unless token && token[0] == :id
       return false unless token[1] == str
-
       @p += 1
       token[1]
     end
@@ -44,18 +41,17 @@ module Liquid
     def look(type, ahead = 0)
       tok = @tokens[@p + ahead]
       return false unless tok
-
       tok[0] == type
     end
 
-    SINGLE_TOKEN_EXPRESSION_TYPES = %i[string number].freeze
+    SINGLE_TOKEN_EXPRESSION_TYPES = [:string, :number].freeze
     private_constant :SINGLE_TOKEN_EXPRESSION_TYPES
 
     def expression
       token = @tokens[@p]
       if token[0] == :id
         variable_signature
-      elsif SINGLE_TOKEN_EXPRESSION_TYPES.include?(token[0])
+      elsif SINGLE_TOKEN_EXPRESSION_TYPES.include? token[0]
         consume
       elsif token.first == :open_round
         consume
@@ -70,9 +66,11 @@ module Liquid
     end
 
     def argument
-      str = +''
+      str = ""
       # might be a keyword argument (identifier: expression)
-      str << consume << consume << ' ' if look(:id) && look(:colon, 1)
+      if look(:id) && look(:colon, 1)
+        str << consume << consume << ' '.freeze
+      end
 
       str << expression
       str

lib/liquid/parser_switching.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   module ParserSwitching
     def parse_with_selected_parser(markup)

lib/liquid/profiler.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'liquid/profiler/hooks'
 
 module Liquid
@@ -99,9 +97,9 @@ module Liquid
     end
 
     def initialize
-      @partial_stack = ['<root>']
+      @partial_stack = ["<root>"]
 
-      @root_timing = Timing.new('', current_partial)
+      @root_timing = Timing.new("", current_partial)
       @timing_stack = [@root_timing]
 
       @render_start_at = Time.now

lib/liquid/profiler/hooks.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class BlockBody
     def render_node_with_profiling(context, output, node)

lib/liquid/range_lookup.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class RangeLookup
     def self.parse(start_markup, end_markup)

lib/liquid/resource_limits.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 module Liquid
   class ResourceLimits
     attr_accessor :render_length, :render_score, :assign_score,
-                  :render_length_limit, :render_score_limit, :assign_score_limit
+      :render_length_limit, :render_score_limit, :assign_score_limit
 
     def initialize(limits)
       @render_length_limit = limits[:render_length_limit]

lib/liquid/standardfilters.rb

@@ -1,24 +1,22 @@
-# frozen_string_literal: true
-
 require 'cgi'
 require 'bigdecimal'
 
 module Liquid
   module StandardFilters
     HTML_ESCAPE = {
-      '&' => '&',
-      '>' => '>',
-      '<' => '&lt;',
-      '"' => '&quot;',
-      "'" => '&#39;',
+      '&'.freeze => '&amp;'.freeze,
+      '>'.freeze => '&gt;'.freeze,
+      '<'.freeze => '&lt;'.freeze,
+      '"'.freeze => '&quot;'.freeze,
+      "'".freeze => '&#39;'.freeze
     }.freeze
-    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/.freeze
+    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/
     STRIP_HTML_BLOCKS = Regexp.union(
-      %r{<script.*?</script>}m,
+      /<script.*?<\/script>/m,
       /<!--.*?-->/m,
-      %r{<style.*?</style>}m
+      /<style.*?<\/style>/m
     )
-    STRIP_HTML_TAGS = /<.*?>/m.freeze
+    STRIP_HTML_TAGS = /<.*?>/m
 
     # Return the size of an array or of an string
     def size(input)
@@ -74,9 +72,8 @@ module Liquid
     end
 
     # Truncate a string down to x characters
-    def truncate(input, length = 50, truncate_string = '...')
+    def truncate(input, length = 50, truncate_string = "...".freeze)
       return if input.nil?
-
       input_str = input.to_s
       length = Utils.to_integer(length)
       truncate_string_str = truncate_string.to_s
@@ -85,14 +82,13 @@ module Liquid
       input_str.length > length ? input_str[0...l].concat(truncate_string_str) : input_str
     end
 
-    def truncatewords(input, words = 15, truncate_string = '...')
+    def truncatewords(input, words = 15, truncate_string = "...".freeze)
       return if input.nil?
-
       wordlist = input.to_s.split
       words = Utils.to_integer(words)
       l = words - 1
       l = 0 if l < 0
-      wordlist.length > l ? wordlist[0..l].join(' ').concat(truncate_string.to_s) : input
+      wordlist.length > l ? wordlist[0..l].join(" ".freeze).concat(truncate_string.to_s) : input
     end
 
     # Split input string into an array of substrings separated by given pattern.
@@ -117,7 +113,7 @@ module Liquid
     end
 
     def strip_html(input)
-      empty = ''
+      empty = ''.freeze
       result = input.to_s.gsub(STRIP_HTML_BLOCKS, empty)
       result.gsub!(STRIP_HTML_TAGS, empty)
       result
@@ -125,11 +121,11 @@ module Liquid
 
     # Remove all newlines from the string
     def strip_newlines(input)
-      input.to_s.gsub(/\r?\n/, '')
+      input.to_s.gsub(/\r?\n/, ''.freeze)
     end
 
     # Join elements of the array with certain character between them
-    def join(input, glue = ' ')
+    def join(input, glue = ' '.freeze)
       InputIterator.new(input).join(glue)
     end
 
@@ -224,7 +220,7 @@ module Liquid
       InputIterator.new(input).map do |e|
         e = e.call if e.is_a?(Proc)
 
-        if property == 'to_liquid'
+        if property == "to_liquid".freeze
           e
         elsif e.respond_to?(:[])
           r = e[property]
@@ -254,23 +250,23 @@ module Liquid
     end
 
     # Replace occurrences of a string with another
-    def replace(input, string, replacement = '')
+    def replace(input, string, replacement = ''.freeze)
       input.to_s.gsub(string.to_s, replacement.to_s)
     end
 
     # Replace the first occurrences of a string with another
-    def replace_first(input, string, replacement = '')
+    def replace_first(input, string, replacement = ''.freeze)
       input.to_s.sub(string.to_s, replacement.to_s)
     end
 
     # remove a substring
     def remove(input, string)
-      input.to_s.gsub(string.to_s, '')
+      input.to_s.gsub(string.to_s, ''.freeze)
     end
 
     # remove the first occurrences of a substring
     def remove_first(input, string)
-      input.to_s.sub(string.to_s, '')
+      input.to_s.sub(string.to_s, ''.freeze)
     end
 
     # add one string to another
@@ -279,8 +275,9 @@ module Liquid
     end
 
     def concat(input, array)
-      raise ArgumentError, 'concat filter requires an array argument' unless array.respond_to?(:to_ary)
-
+      unless array.respond_to?(:to_ary)
+        raise ArgumentError.new("concat filter requires an array argument")
+      end
       InputIterator.new(input).concat(array)
     end
 
@@ -291,7 +288,7 @@ module Liquid
 
     # Add <br /> tags in front of all newlines in input string
     def newline_to_br(input)
-      input.to_s.gsub(/\n/, "<br />\n")
+      input.to_s.gsub(/\n/, "<br />\n".freeze)
     end
 
     # Reformat a date using Ruby's core Time#strftime( string ) -> string
@@ -328,7 +325,7 @@ module Liquid
     def date(input, format)
       return input if format.to_s.empty?
 
-      return input unless (date = Utils.to_date(input))
+      return input unless date = Utils.to_date(input)
 
       date.strftime(format.to_s)
     end
@@ -422,7 +419,7 @@ module Liquid
       result.is_a?(BigDecimal) ? result.to_f : result
     end
 
-    def default(input, default_value = '')
+    def default(input, default_value = ''.freeze)
       if !input || input.respond_to?(:empty?) && input.empty?
         default_value
       else
@@ -433,7 +430,7 @@ module Liquid
     private
 
     def raise_property_error(property)
-      raise Liquid::ArgumentError, "cannot select the property '#{property}'"
+      raise Liquid::ArgumentError.new("cannot select the property '#{property}'")
     end
 
     def apply_operation(input, operand, operation)

lib/liquid/strainer.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'set'
 
 module Liquid
@@ -9,12 +7,12 @@ module Liquid
   # The Strainer only allows method calls defined in filters given to it via Strainer.global_filter,
   # Context#add_filters or Template.register_filter
   class Strainer #:nodoc:
-    @global_strainer = Class.new(Strainer) do
+    @@global_strainer = Class.new(Strainer) do
       @filter_methods = Set.new
     end
-    @strainer_class_cache = Hash.new do |hash, filters|
-      hash[filters] = Class.new(@global_strainer) do
-        @filter_methods = Strainer.global_strainer.filter_methods.dup
+    @@strainer_class_cache = Hash.new do |hash, filters|
+      hash[filters] = Class.new(@@global_strainer) do
+        @filter_methods = @@global_strainer.filter_methods.dup
         filters.each { |f| add_filter(f) }
       end
     end
@@ -24,14 +22,12 @@ module Liquid
     end
 
     class << self
-      attr_accessor :strainer_class_cache, :global_strainer
       attr_reader :filter_methods
     end
 
     def self.add_filter(filter)
       raise ArgumentError, "Expected module but got: #{filter.class}" unless filter.is_a?(Module)
-
-      unless include?(filter)
+      unless self.include?(filter)
         invokable_non_public_methods = (filter.private_instance_methods + filter.protected_instance_methods).select { |m| invokable?(m) }
         if invokable_non_public_methods.any?
           raise MethodOverrideError, "Filter overrides registered public methods as non public: #{invokable_non_public_methods.join(', ')}"
@@ -43,8 +39,8 @@ module Liquid
     end
 
     def self.global_filter(filter)
-      @strainer_class_cache.clear
-      @global_strainer.add_filter(filter)
+      @@strainer_class_cache.clear
+      @@global_strainer.add_filter(filter)
     end
 
     def self.invokable?(method)
@@ -52,13 +48,13 @@ module Liquid
     end
 
     def self.create(context, filters = [])
-      @strainer_class_cache[filters].new(context)
+      @@strainer_class_cache[filters].new(context)
     end
 
     def invoke(method, *args)
       if self.class.invokable?(method)
         send(method, *args)
-      elsif @context&.strict_filters
+      elsif @context && @context.strict_filters
         raise Liquid::UndefinedFilter, "undefined filter #{method}"
       else
         args.first

lib/liquid/tablerowloop_drop.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class TablerowloopDrop < Drop
     def initialize(length, cols)

lib/liquid/tag.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   class Tag
     attr_reader :nodelist, :tag_name, :line_number, :parse_context
@@ -7,8 +5,8 @@ module Liquid
     include ParserSwitching
 
     class << self
-      def parse(tag_name, markup, tokenizer, options)
-        tag = new(tag_name, markup, options)
+      def parse(tag_name, markup, tokenizer, parse_context)
+        tag = new(tag_name, markup, parse_context)
         tag.parse(tokenizer)
         tag
       end
@@ -23,7 +21,8 @@ module Liquid
       @line_number = parse_context.line_number
     end
 
-    def parse(_tokens); end
+    def parse(_tokens)
+    end
 
     def raw
       "#{@tag_name} #{@markup}"
@@ -34,7 +33,7 @@ module Liquid
     end
 
     def render(_context)
-      ''
+      ''.freeze
     end
 
     # For backwards compatibility with custom tags. In a future release, the semantics

lib/liquid/tags/assign.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Assign sets a variable in your template.
   #
@@ -10,17 +8,21 @@ module Liquid
   #  {{ foo }}
   #
   class Assign < Tag
-    SYNTAX = /(#{VARIABLE_SIGNATURE}+)\s*=\s*(.*)\s*/om.freeze
+    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
+
+    def self.syntax_error_translation_key
+      "errors.syntax.assign".freeze
+    end
 
     attr_reader :to, :from
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ SYNTAX
-        @to = Regexp.last_match(1)
-        @from = Variable.new(Regexp.last_match(2), options)
+      if markup =~ Syntax
+        @to = $1
+        @from = Variable.new($2, options)
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.assign')
+        raise SyntaxError.new(options[:locale].t(self.class.syntax_error_translation_key))
       end
     end
 
@@ -57,5 +59,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('assign', Assign)
+  Template.register_tag('assign'.freeze, Assign)
 end

lib/liquid/tags/break.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Break tag to be used to break out of a for loop.
   #
@@ -16,5 +14,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('break', Break)
+  Template.register_tag('break'.freeze, Break)
 end

lib/liquid/tags/capture.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Capture stores the result of a block into a variable without rendering it inplace.
   #
@@ -13,14 +11,14 @@ module Liquid
   # in a sidebar or footer.
   #
   class Capture < Block
-    SYNTAX = /(#{VARIABLE_SIGNATURE}+)/o.freeze
+    Syntax = /(#{VariableSignature}+)/o
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ SYNTAX
-        @to = Regexp.last_match(1)
+      if markup =~ Syntax
+        @to = $1
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.capture')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.capture"))
       end
     end
 
@@ -37,5 +35,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('capture', Capture)
+  Template.register_tag('capture'.freeze, Capture)
 end

lib/liquid/tags/case.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 module Liquid
   class Case < Block
-    SYNTAX = /(#{QUOTED_FRAGMENT})/o.freeze
-    WHEN_SYNTAX = /(#{QUOTED_FRAGMENT})(?:(?:\s+or\s+|\s*\,\s*)(#{QUOTED_FRAGMENT}.*))?/om.freeze
+    Syntax     = /(#{QuotedFragment})/o
+    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/om
 
     attr_reader :blocks, :left
 
@@ -11,16 +9,18 @@ module Liquid
       super
       @blocks = []
 
-      if markup =~ SYNTAX
-        @left = Expression.parse(Regexp.last_match(1))
+      if markup =~ Syntax
+        @left = Expression.parse($1)
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.case')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.case".freeze))
       end
     end
 
     def parse(tokens)
       body = BlockBody.new
-      body = @blocks.last.attachment while parse_body(body, tokens)
+      while parse_body(body, tokens)
+        body = @blocks.last.attachment
+      end
     end
 
     def nodelist
@@ -29,9 +29,9 @@ module Liquid
 
     def unknown_tag(tag, markup, tokens)
       case tag
-      when 'when'
+      when 'when'.freeze
         record_when_condition(markup)
-      when 'else'
+      when 'else'.freeze
         record_else_condition(markup)
       else
         super
@@ -61,18 +61,22 @@ module Liquid
       body = BlockBody.new
 
       while markup
-        raise SyntaxError, options[:locale].t('errors.syntax.case_invalid_when') unless markup =~ WHEN_SYNTAX
+        unless markup =~ WhenSyntax
+          raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_when".freeze))
+        end
 
-        markup = Regexp.last_match(2)
+        markup = $2
 
-        block = Condition.new(@left, '==', Expression.parse(Regexp.last_match(1)))
+        block = Condition.new(@left, '=='.freeze, Expression.parse($1))
         block.attach(body)
         @blocks << block
       end
     end
 
     def record_else_condition(markup)
-      raise SyntaxError, options[:locale].t('errors.syntax.case_invalid_else') unless markup.strip.empty?
+      unless markup.strip.empty?
+        raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_else".freeze))
+      end
 
       block = ElseCondition.new
       block.attach(BlockBody.new)
@@ -86,5 +90,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('case', Case)
+  Template.register_tag('case'.freeze, Case)
 end

lib/liquid/tags/comment.rb

@@ -1,17 +1,16 @@
-# frozen_string_literal: true
-
 module Liquid
   class Comment < Block
     def render_to_output_buffer(_context, output)
       output
     end
 
-    def unknown_tag(_tag, _markup, _tokens); end
+    def unknown_tag(_tag, _markup, _tokens)
+    end
 
     def blank?
       true
     end
   end
 
-  Template.register_tag('comment', Comment)
+  Template.register_tag('comment'.freeze, Comment)
 end

lib/liquid/tags/continue.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Continue tag to be used to break out of a for loop.
   #
@@ -16,5 +14,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('continue', Continue)
+  Template.register_tag('continue'.freeze, Continue)
 end

lib/liquid/tags/cycle.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Cycle is usually used within a loop to alternate between values, like colors or DOM classes.
   #
@@ -14,22 +12,22 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SIMPLE_SYNTAX = /\A#{QUOTED_FRAGMENT}+/o.freeze
-    NAMED_SYNTAX  = /\A(#{QUOTED_FRAGMENT})\s*\:\s*(.*)/om.freeze
+    SimpleSyntax = /\A#{QuotedFragment}+/o
+    NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
 
     attr_reader :variables
 
     def initialize(tag_name, markup, options)
       super
       case markup
-      when NAMED_SYNTAX
-        @variables = variables_from_string(Regexp.last_match(2))
-        @name = Expression.parse(Regexp.last_match(1))
-      when SIMPLE_SYNTAX
+      when NamedSyntax
+        @variables = variables_from_string($2)
+        @name = Expression.parse($1)
+      when SimpleSyntax
         @variables = variables_from_string(markup)
         @name = @variables.to_s
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.cycle')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.cycle".freeze))
       end
     end
 
@@ -62,8 +60,8 @@ module Liquid
 
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-        var =~ /\s*(#{QUOTED_FRAGMENT})\s*/o
-        Regexp.last_match(1) ? Expression.parse(Regexp.last_match(1)) : nil
+        var =~ /\s*(#{QuotedFragment})\s*/o
+        $1 ? Expression.parse($1) : nil
       end.compact
     end
 

lib/liquid/tags/decrement.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # decrement is used in a place where one needs to insert a counter
   #     into a template, and needs the counter to survive across
@@ -34,5 +32,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('decrement', Decrement)
+  Template.register_tag('decrement'.freeze, Decrement)
 end

lib/liquid/tags/echo.rb

@@ -0,0 +1,24 @@
+module Liquid
+  # Echo outputs an expression
+  #
+  #   {% echo monkey %}
+  #   {% echo user.name %}
+  #
+  # This is identical to variable output syntax, like {{ foo }}, but works
+  # inside {% liquid %} tags. The full syntax is supported, including filters:
+  #
+  #   {% echo user | link %}
+  #
+  class Echo < Tag
+    def initialize(tag_name, markup, parse_context)
+      super
+      @variable = Variable.new(markup, parse_context)
+    end
+
+    def render(context)
+      @variable.render_to_output_buffer(context, '')
+    end
+  end
+
+  Template.register_tag('echo'.freeze, Echo)
+end

lib/liquid/tags/for.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # "For" iterates over an array or collection.
   # Several useful variables are available to you within the loop.
@@ -46,7 +44,7 @@ module Liquid
   # forloop.parentloop:: Provides access to the parent loop, if present.
   #
   class For < Block
-    SYNTAX = /\A(#{VARIABLE_SEGMENT}+)\s+in\s+(#{QUOTED_FRAGMENT}+)\s*(reversed)?/o.freeze
+    Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
 
     attr_reader :collection_name, :variable_name, :limit, :from
 
@@ -60,7 +58,6 @@ module Liquid
 
     def parse(tokens)
       return unless parse_body(@for_block, tokens)
-
       parse_body(@else_block, tokens)
     end
 
@@ -69,8 +66,7 @@ module Liquid
     end
 
     def unknown_tag(tag, markup, tokens)
-      return super unless tag == 'else'
-
+      return super unless tag == 'else'.freeze
       @else_block = BlockBody.new
     end
 
@@ -89,35 +85,33 @@ module Liquid
     protected
 
     def lax_parse(markup)
-      if markup =~ SYNTAX
-        @variable_name = Regexp.last_match(1)
-        collection_name = Regexp.last_match(2)
-        @reversed = !!Regexp.last_match(3)
+      if markup =~ Syntax
+        @variable_name = $1
+        collection_name = $2
+        @reversed = !!$3
         @name = "#{@variable_name}-#{collection_name}"
         @collection_name = Expression.parse(collection_name)
-        markup.scan(TAG_ATTRIBUTES) do |key, value|
+        markup.scan(TagAttributes) do |key, value|
           set_attribute(key, value)
         end
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.for')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.for".freeze))
       end
     end
 
     def strict_parse(markup)
       p = Parser.new(markup)
       @variable_name = p.consume(:id)
-      raise SyntaxError, options[:locale].t('errors.syntax.for_invalid_in') unless p.id?('in')
-
+      raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_in".freeze)) unless p.id?('in'.freeze)
       collection_name = p.expression
       @name = "#{@variable_name}-#{collection_name}"
       @collection_name = Expression.parse(collection_name)
-      @reversed = p.id?('reversed')
+      @reversed = p.id?('reversed'.freeze)
 
       while p.look(:id) && p.look(:colon, 1)
-        unless (attribute = p.id?('limit') || p.id?('offset'))
-          raise SyntaxError, options[:locale].t('errors.syntax.for_invalid_attribute')
+        unless attribute = p.id?('limit'.freeze) || p.id?('offset'.freeze)
+          raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_attribute".freeze))
         end
-
         p.consume
         set_attribute(attribute, p.expression)
       end
@@ -168,7 +162,7 @@ module Liquid
         for_stack.push(loop_vars)
 
         begin
-          context['forloop'] = loop_vars
+          context['forloop'.freeze] = loop_vars
 
           segment.each do |item|
             context[@variable_name] = item
@@ -176,11 +170,11 @@ module Liquid
             loop_vars.send(:increment!)
 
             # Handle any interrupts if they exist.
-            next unless context.interrupt?
-
-            interrupt = context.pop_interrupt
-            break if interrupt.is_a?(BreakInterrupt)
-            next if interrupt.is_a?(ContinueInterrupt)
+            if context.interrupt?
+              interrupt = context.pop_interrupt
+              break if interrupt.is_a? BreakInterrupt
+              next if interrupt.is_a? ContinueInterrupt
+            end
           end
         ensure
           for_stack.pop
@@ -192,13 +186,13 @@ module Liquid
 
     def set_attribute(key, expr)
       case key
-      when 'offset'
-        @from = if expr == 'continue'
+      when 'offset'.freeze
+        @from = if expr == 'continue'.freeze
           :continue
         else
           Expression.parse(expr)
         end
-      when 'limit'
+      when 'limit'.freeze
         @limit = Expression.parse(expr)
       end
     end
@@ -218,5 +212,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('for', For)
+  Template.register_tag('for'.freeze, For)
 end

lib/liquid/tags/if.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # If is the conditional block
   #
@@ -12,16 +10,16 @@ module Liquid
   #    There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
   #
   class If < Block
-    SYNTAX = /(#{QUOTED_FRAGMENT})\s*([=!<>a-z_]+)?\s*(#{QUOTED_FRAGMENT})?/o.freeze
-    EXPRESSIONS_AND_OPERATORS = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QUOTED_FRAGMENT}|\S+)\s*)+)/o.freeze
-    BOOLEAN_OPERATORS = %w[and or].freeze
+    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
+    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
+    BOOLEAN_OPERATORS = %w(and or).freeze
 
     attr_reader :blocks
 
     def initialize(tag_name, markup, options)
       super
       @blocks = []
-      push_block('if', markup)
+      push_block('if'.freeze, markup)
     end
 
     def nodelist
@@ -34,7 +32,7 @@ module Liquid
     end
 
     def unknown_tag(tag, markup, tokens)
-      if %w[elsif else].include?(tag)
+      if ['elsif'.freeze, 'else'.freeze].include?(tag)
         push_block(tag, markup)
       else
         super
@@ -44,7 +42,9 @@ module Liquid
     def render_to_output_buffer(context, output)
       context.stack do
         @blocks.each do |block|
-          return block.attachment.render_to_output_buffer(context, output) if block.evaluate(context)
+          if block.evaluate(context)
+            return block.attachment.render_to_output_buffer(context, output)
+          end
         end
       end
 
@@ -54,7 +54,7 @@ module Liquid
     private
 
     def push_block(tag, markup)
-      block = if tag == 'else'
+      block = if tag == 'else'.freeze
         ElseCondition.new
       else
         parse_with_selected_parser(markup)
@@ -65,19 +65,18 @@ module Liquid
     end
 
     def lax_parse(markup)
-      expressions = markup.scan(EXPRESSIONS_AND_OPERATORS)
-      raise SyntaxError, options[:locale].t('errors.syntax.if') unless expressions.pop =~ SYNTAX
+      expressions = markup.scan(ExpressionsAndOperators)
+      raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop =~ Syntax
 
-      condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
+      condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
 
       until expressions.empty?
         operator = expressions.pop.to_s.strip
 
-        raise SyntaxError, options[:locale].t('errors.syntax.if') unless expressions.pop.to_s =~ SYNTAX
-
-        new_condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
-        raise SyntaxError, options[:locale].t('errors.syntax.if') unless BOOLEAN_OPERATORS.include?(operator)
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop.to_s =~ Syntax
 
+        new_condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless BOOLEAN_OPERATORS.include?(operator)
         new_condition.send(operator, condition)
         condition = new_condition
       end
@@ -95,7 +94,7 @@ module Liquid
     def parse_binary_comparisons(p)
       condition = parse_comparison(p)
       first_condition = condition
-      while (op = (p.id?('and') || p.id?('or')))
+      while op = (p.id?('and'.freeze) || p.id?('or'.freeze))
         child_condition = parse_comparison(p)
         condition.send(op, child_condition)
         condition = child_condition
@@ -105,7 +104,7 @@ module Liquid
 
     def parse_comparison(p)
       a = Expression.parse(p.expression)
-      if (op = p.consume?(:comparison))
+      if op = p.consume?(:comparison)
         b = Expression.parse(p.expression)
         Condition.new(a, op, b)
       else
@@ -120,5 +119,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('if', If)
+  Template.register_tag('if'.freeze, If)
 end

lib/liquid/tags/ifchanged.rb

@@ -1,10 +1,8 @@
-# frozen_string_literal: true
-
 module Liquid
   class Ifchanged < Block
     def render_to_output_buffer(context, output)
       context.stack do
-        block_output = +''
+        block_output = ''
         super(context, block_output)
 
         if block_output != context.registers[:ifchanged]
@@ -17,5 +15,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('ifchanged', Ifchanged)
+  Template.register_tag('ifchanged'.freeze, Ifchanged)
 end

lib/liquid/tags/include.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Include allows templates to relate with other templates
   #
@@ -16,39 +14,40 @@ module Liquid
   #   {% include 'product' for products %}
   #
   class Include < Tag
-    SYNTAX = /(#{QUOTED_FRAGMENT}+)(\s+(?:with|for)\s+(#{QUOTED_FRAGMENT}+))?/o.freeze
+    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/o
 
     attr_reader :template_name_expr, :variable_name_expr, :attributes
 
     def initialize(tag_name, markup, options)
       super
 
-      if markup =~ SYNTAX
+      if markup =~ Syntax
 
-        template_name = Regexp.last_match(1)
-        variable_name = Regexp.last_match(3)
+        template_name = $1
+        variable_name = $3
 
         @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
         @template_name_expr = Expression.parse(template_name)
         @attributes = {}
 
-        markup.scan(TAG_ATTRIBUTES) do |key, value|
+        markup.scan(TagAttributes) do |key, value|
           @attributes[key] = Expression.parse(value)
         end
 
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.include')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.include".freeze))
       end
     end
 
-    def parse(_tokens); end
+    def parse(_tokens)
+    end
 
     def render_to_output_buffer(context, output)
       template_name = context.evaluate(@template_name_expr)
-      raise ArgumentError, options[:locale].t('errors.argument.include') unless template_name
+      raise ArgumentError.new(options[:locale].t("errors.argument.include")) unless template_name
 
       partial = load_cached_partial(template_name, context)
-      context_variable_name = template_name.split('/').last
+      context_variable_name = template_name.split('/'.freeze).last
 
       variable = if @variable_name_expr
         context.evaluate(@variable_name_expr)
@@ -92,10 +91,9 @@ module Liquid
     def load_cached_partial(template_name, context)
       cached_partials = context.registers[:cached_partials] || {}
 
-      if (cached = cached_partials[template_name])
+      if cached = cached_partials[template_name]
         return cached
       end
-
       source = read_template_from_file_system(context)
       begin
         parse_context.partial = true
@@ -118,11 +116,11 @@ module Liquid
       def children
         [
           @node.template_name_expr,
-          @node.variable_name_expr,
+          @node.variable_name_expr
         ] + @node.attributes.values
       end
     end
   end
 
-  Template.register_tag('include', Include)
+  Template.register_tag('include'.freeze, Include)
 end

lib/liquid/tags/increment.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # increment is used in a place where one needs to insert a counter
   #     into a template, and needs the counter to survive across
@@ -30,5 +28,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('increment', Increment)
+  Template.register_tag('increment'.freeze, Increment)
 end

lib/liquid/tags/raw.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 module Liquid
   class Raw < Block
-    SYNTAX = /\A\s*\z/.freeze
-    FULL_TOKEN_POSSIBLY_INVALID = /\A(.*)#{TAG_START}\s*(\w+)\s*(.*)?#{TAG_END}\z/om.freeze
+    Syntax = /\A\s*\z/
+    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
 
     def initialize(tag_name, markup, parse_context)
       super
@@ -12,16 +10,16 @@ module Liquid
     end
 
     def parse(tokens)
-      @body = +''
-      while (token = tokens.shift)
-        if token =~ FULL_TOKEN_POSSIBLY_INVALID
-          @body << Regexp.last_match(1) if Regexp.last_match(1) != ''
-          return if block_delimiter == Regexp.last_match(2)
+      @body = ''
+      while token = tokens.shift
+        if token =~ FullTokenPossiblyInvalid
+          @body << $1 if $1 != "".freeze
+          return if block_delimiter == $2
         end
         @body << token unless token.empty?
       end
 
-      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_never_closed', block_name: block_name)
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
     end
 
     def render_to_output_buffer(_context, output)
@@ -40,9 +38,11 @@ module Liquid
     protected
 
     def ensure_valid_markup(tag_name, markup, parse_context)
-      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_unexpected_args', tag: tag_name) unless markup =~ SYNTAX
+      unless markup =~ Syntax
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_unexpected_args".freeze, tag: tag_name))
+      end
     end
   end
 
-  Template.register_tag('raw', Raw)
+  Template.register_tag('raw'.freeze, Raw)
 end

lib/liquid/tags/table_row.rb

@@ -1,41 +1,39 @@
-# frozen_string_literal: true
-
 module Liquid
   class TableRow < Block
-    SYNTAX = /(\w+)\s+in\s+(#{QUOTED_FRAGMENT}+)/o.freeze
+    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
 
     attr_reader :variable_name, :collection_name, :attributes
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ SYNTAX
-        @variable_name = Regexp.last_match(1)
-        @collection_name = Expression.parse(Regexp.last_match(2))
+      if markup =~ Syntax
+        @variable_name = $1
+        @collection_name = Expression.parse($2)
         @attributes = {}
-        markup.scan(TAG_ATTRIBUTES) do |key, value|
+        markup.scan(TagAttributes) do |key, value|
           @attributes[key] = Expression.parse(value)
         end
       else
-        raise SyntaxError, options[:locale].t('errors.syntax.table_row')
+        raise SyntaxError.new(options[:locale].t("errors.syntax.table_row".freeze))
       end
     end
 
     def render_to_output_buffer(context, output)
-      (collection = context.evaluate(@collection_name)) || (return '')
+      collection = context.evaluate(@collection_name) or return ''.freeze
 
-      from = @attributes.key?('offset') ? context.evaluate(@attributes['offset']).to_i : 0
-      to = @attributes.key?('limit') ? from + context.evaluate(@attributes['limit']).to_i : nil
+      from = @attributes.key?('offset'.freeze) ? context.evaluate(@attributes['offset'.freeze]).to_i : 0
+      to = @attributes.key?('limit'.freeze) ? from + context.evaluate(@attributes['limit'.freeze]).to_i : nil
 
       collection = Utils.slice_collection(collection, from, to)
 
       length = collection.length
 
-      cols = context.evaluate(@attributes['cols']).to_i
+      cols = context.evaluate(@attributes['cols'.freeze]).to_i
 
       output << "<tr class=\"row1\">\n"
       context.stack do
         tablerowloop = Liquid::TablerowloopDrop.new(length, cols)
-        context['tablerowloop'] = tablerowloop
+        context['tablerowloop'.freeze] = tablerowloop
 
         collection.each do |item|
           context[@variable_name] = item
@@ -44,7 +42,9 @@ module Liquid
           super
           output << '</td>'
 
-          output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">" if tablerowloop.col_last && !tablerowloop.last
+          if tablerowloop.col_last && !tablerowloop.last
+            output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">"
+          end
 
           tablerowloop.send(:increment!)
         end
@@ -61,5 +61,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('tablerow', TableRow)
+  Template.register_tag('tablerow'.freeze, TableRow)
 end

lib/liquid/tags/unless.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require_relative 'if'
 
 module Liquid
@@ -12,11 +10,15 @@ module Liquid
       context.stack do
         # First condition is interpreted backwards ( if not )
         first_block = @blocks.first
-        return first_block.attachment.render_to_output_buffer(context, output) unless first_block.evaluate(context)
+        unless first_block.evaluate(context)
+          return first_block.attachment.render_to_output_buffer(context, output)
+        end
 
         # After the first condition unless works just like if
         @blocks[1..-1].each do |block|
-          return block.attachment.render_to_output_buffer(context, output) if block.evaluate(context)
+          if block.evaluate(context)
+            return block.attachment.render_to_output_buffer(context, output)
+          end
         end
       end
 
@@ -24,5 +26,5 @@ module Liquid
     end
   end
 
-  Template.register_tag('unless', Unless)
+  Template.register_tag('unless'.freeze, Unless)
 end

lib/liquid/template.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Templates are central to liquid.
   # Interpretating templates is a two step process. First you compile the
@@ -18,11 +16,7 @@ module Liquid
     attr_accessor :root
     attr_reader :resource_limits, :warnings
 
-    @file_system = BlankFileSystem.new
-
-    class << self
-      attr_accessor :file_system
-    end
+    @@file_system = BlankFileSystem.new
 
     class TagRegistry
       include Enumerable
@@ -80,6 +74,14 @@ module Liquid
         exception
       end
 
+      def file_system
+        @@file_system
+      end
+
+      def file_system=(obj)
+        @@file_system = obj
+      end
+
       def register_tag(name, klass)
         tags[name.to_s] = klass
       end
@@ -163,13 +165,15 @@ module Liquid
     #    filters and tags and might be useful to integrate liquid more with its host application
     #
     def render(*args)
-      return '' if @root.nil?
+      return ''.freeze if @root.nil?
 
       context = case args.first
       when Liquid::Context
         c = args.shift
 
-        c.exception_renderer = ->(_e) { raise } if @rethrow_errors
+        if @rethrow_errors
+          c.exception_renderer = ->(e) { raise }
+        end
 
         c
       when Liquid::Drop
@@ -180,7 +184,7 @@ module Liquid
       when nil
         Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
       else
-        raise ArgumentError, 'Expected Hash or Liquid::Context as parameter'
+        raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
       end
 
       output = nil
@@ -204,7 +208,7 @@ module Liquid
         # render the nodelist.
         # for performance reasons we get an array back here. join will make a string out of it.
         with_profiling(context) do
-          @root.render_to_output_buffer(context, output || +'')
+          @root.render_to_output_buffer(context, output || '')
         end
       rescue Liquid::MemoryError => e
         context.handle_error(e)

lib/liquid/tokenizer.rb

@@ -1,31 +1,35 @@
-# frozen_string_literal: true
-
 module Liquid
   class Tokenizer
-    attr_reader :line_number
+    attr_reader :line_number, :for_liquid_tag
 
-    def initialize(source, line_numbers = false)
+    def initialize(source, line_numbers = false, line_number: nil, for_liquid_tag: false)
       @source = source
-      @line_number = line_numbers ? 1 : nil
+      @line_number = line_number || (line_numbers ? 1 : nil)
+      @for_liquid_tag = for_liquid_tag
       @tokens = tokenize
     end
 
     def shift
-      token = @tokens.shift
-      @line_number += token.count("\n") if @line_number && token
+      token = @tokens.shift or return
+
+      if @line_number
+        @line_number += @for_liquid_tag ? 1 : token.count("\n")
+      end
+
       token
     end
 
     private
 
     def tokenize
-      @source = @source.source if @source.respond_to?(:source)
       return [] if @source.to_s.empty?
 
-      tokens = @source.split(TEMPLATE_PARSER)
+      return @source.split("\n") if @for_liquid_tag
+
+      tokens = @source.split(TemplateParser)
 
       # removes the rogue empty element at the beginning of the array
-      tokens.shift if tokens[0]&.empty?
+      tokens.shift if tokens[0] && tokens[0].empty?
 
       tokens
     end

lib/liquid/utils.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   module Utils
     def self.slice_collection(collection, from, to)
@@ -21,9 +19,13 @@ module Liquid
       return [] unless collection.respond_to?(:each)
 
       collection.each do |item|
-        break if to && to <= index
+        if to && to <= index
+          break
+        end
 
-        segments << item if from <= index
+        if from <= index
+          segments << item
+        end
 
         index += 1
       end
@@ -33,12 +35,11 @@ module Liquid
 
     def self.to_integer(num)
       return num if num.is_a?(Integer)
-
       num = num.to_s
       begin
         Integer(num)
       rescue ::ArgumentError
-        raise Liquid::ArgumentError, 'invalid integer'
+        raise Liquid::ArgumentError, "invalid integer"
       end
     end
 
@@ -49,7 +50,7 @@ module Liquid
       when Numeric
         obj
       when String
-        obj.strip =~ /\A-?\d+\.\d+\z/ ? BigDecimal(obj) : obj.to_i
+        (obj.strip =~ /\A-?\d+\.\d+\z/) ? BigDecimal(obj) : obj.to_i
       else
         if obj.respond_to?(:to_number)
           obj.to_number
@@ -64,12 +65,11 @@ module Liquid
 
       if obj.is_a?(String)
         return nil if obj.empty?
-
         obj = obj.downcase
       end
 
       case obj
-      when 'now', 'today'
+      when 'now'.freeze, 'today'.freeze
         Time.now
       when /\A\d+\z/, Integer
         Time.at(obj.to_i)

lib/liquid/variable.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module Liquid
   # Holds variables. Variables are only loaded "just in time"
   # and are not evaluated as part of the render stage
@@ -12,11 +10,11 @@ module Liquid
   #   {{ user | link }}
   #
   class Variable
-    FILTER_MARKUP_REGEX = /#{FILTER_SEPARATOR}\s*(.*)/om.freeze
-    FILTER_PARSER = /(?:\s+|#{QUOTED_FRAGMENT}|#{ARGUMENT_SEPARATOR})+/o.freeze
-    FILTER_ARGS_REGEX = /(?:#{FILTER_ARGUMENT_SEPARATOR}|#{ARGUMENT_SEPARATOR})\s*((?:\w+\s*\:\s*)?#{QUOTED_FRAGMENT})/o.freeze
-    JUST_TAG_ATTRIBUTES = /\A#{TAG_ATTRIBUTES}\z/o.freeze
-    MARKUP_WITH_QUOTED_FRAGMENT = /(#{QUOTED_FRAGMENT})(.*)/om.freeze
+    FilterMarkupRegex = /#{FilterSeparator}\s*(.*)/om
+    FilterParser = /(?:\s+|#{QuotedFragment}|#{ArgumentSeparator})+/o
+    FilterArgsRegex = /(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o
+    JustTagAttributes = /\A#{TagAttributes}\z/o
+    MarkupWithQuotedFragment = /(#{QuotedFragment})(.*)/om
 
     attr_accessor :filters, :name, :line_number
     attr_reader :parse_context
@@ -43,18 +41,17 @@ module Liquid
 
     def lax_parse(markup)
       @filters = []
-      return unless markup =~ MARKUP_WITH_QUOTED_FRAGMENT
+      return unless markup =~ MarkupWithQuotedFragment
 
-      name_markup = Regexp.last_match(1)
-      filter_markup = Regexp.last_match(2)
+      name_markup = $1
+      filter_markup = $2
       @name = Expression.parse(name_markup)
-      if filter_markup =~ FILTER_MARKUP_REGEX
-        filters = Regexp.last_match(1).scan(FILTER_PARSER)
+      if filter_markup =~ FilterMarkupRegex
+        filters = $1.scan(FilterParser)
         filters.each do |f|
           next unless f =~ /\w+/
-
           filtername = Regexp.last_match(0)
-          filterargs = f.scan(FILTER_ARGS_REGEX).flatten
+          filterargs = f.scan(FilterArgsRegex).flatten
           @filters << parse_filter_expressions(filtername, filterargs)
         end
       end
@@ -111,7 +108,7 @@ module Liquid
       filter_args = []
       keyword_args = nil
       unparsed_args.each do |a|
-        if (matches = a.match(JUST_TAG_ATTRIBUTES))
+        if matches = a.match(JustTagAttributes)
           keyword_args ||= {}
           keyword_args[matches[1]] = Expression.parse(matches[2])
         else
@@ -124,7 +121,7 @@ module Liquid
     end
 
     def evaluate_filter_expressions(context, filter_args, filter_kwargs)
-      parsed_args = filter_args.map { |expr| context.evaluate(expr) }
+      parsed_args = filter_args.map{ |expr| context.evaluate(expr) }
       if filter_kwargs
         parsed_kwargs = {}
         filter_kwargs.each do |key, expr|
@@ -139,7 +136,7 @@ module Liquid
       return unless obj.tainted?
       return if Template.taint_mode == :lax
 
-      @markup =~ QUOTED_FRAGMENT
+      @markup =~ QuotedFragment
       name = Regexp.last_match(0)
 
       error = TaintedError.new("variable '#{name}' is tainted and was not escaped")

lib/liquid/variable_lookup.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 module Liquid
   class VariableLookup
-    SQUARE_BRACKETED = /\A\[(.*)\]\z/m.freeze
-    COMMAND_METHODS = %w[size first last].freeze
+    SQUARE_BRACKETED = /\A\[(.*)\]\z/m
+    COMMAND_METHODS = ['size'.freeze, 'first'.freeze, 'last'.freeze].freeze
 
     attr_reader :name, :lookups
 
@@ -12,10 +10,12 @@ module Liquid
     end
 
     def initialize(markup)
-      lookups = markup.scan(VARIABLE_PARSER)
+      lookups = markup.scan(VariableParser)
 
       name = lookups.shift
-      name = Expression.parse(Regexp.last_match(1)) if name =~ SQUARE_BRACKETED
+      if name =~ SQUARE_BRACKETED
+        name = Expression.parse($1)
+      end
       @name = name
 
       @lookups = lookups
@@ -24,7 +24,7 @@ module Liquid
       @lookups.each_index do |i|
         lookup = lookups[i]
         if lookup =~ SQUARE_BRACKETED
-          lookups[i] = Expression.parse(Regexp.last_match(1))
+          lookups[i] = Expression.parse($1)
         elsif COMMAND_METHODS.include?(lookup)
           @command_flags |= 1 << i
         end
@@ -41,8 +41,8 @@ module Liquid
         # If object is a hash- or array-like object we look for the
         # presence of the key and if its available we return it
         if object.respond_to?(:[]) &&
-           ((object.respond_to?(:key?) && object.key?(key)) ||
-            (object.respond_to?(:fetch) && key.is_a?(Integer)))
+            ((object.respond_to?(:key?) && object.key?(key)) ||
+             (object.respond_to?(:fetch) && key.is_a?(Integer)))
 
           # if its a proc we will replace the entry with the proc
           res = context.lookup_and_evaluate(object, key)
@@ -59,7 +59,6 @@ module Liquid
           # raise an exception if `strict_variables` option is set to true
         else
           return nil unless context.strict_variables
-
           raise Liquid::UndefinedVariable, "undefined variable #{key}"
         end
 

lib/liquid/version.rb

@@ -1,5 +1,5 @@
-# frozen_string_literal: true
+# encoding: utf-8
 
 module Liquid
-  VERSION = '4.0.3'
+  VERSION = "4.0.3".freeze
 end

liquid.gemspec

@@ -1,31 +1,31 @@
-# frozen_string_literal: true
+# encoding: utf-8
 
-lib = File.expand_path('lib', __dir__)
-$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+lib = File.expand_path('../lib/', __FILE__)
+$LOAD_PATH.unshift lib unless $LOAD_PATH.include?(lib)
 
-require 'liquid/version'
+require "liquid/version"
 
 Gem::Specification.new do |s|
-  s.name        = 'liquid'
+  s.name        = "liquid"
   s.version     = Liquid::VERSION
   s.platform    = Gem::Platform::RUBY
-  s.summary     = 'A secure, non-evaling end user template engine with aesthetic markup.'
-  s.authors     = ['Tobias Lütke']
-  s.email       = ['tobi@leetsoft.com']
-  s.homepage    = 'http://www.liquidmarkup.org'
-  s.license     = 'MIT'
+  s.summary     = "A secure, non-evaling end user template engine with aesthetic markup."
+  s.authors     = ["Tobias Lütke"]
+  s.email       = ["tobi@leetsoft.com"]
+  s.homepage    = "http://www.liquidmarkup.org"
+  s.license     = "MIT"
   # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
 
-  s.required_ruby_version     = '>= 2.4.0'
-  s.required_rubygems_version = '>= 1.3.7'
+  s.required_ruby_version     = ">= 2.4.0"
+  s.required_rubygems_version = ">= 1.3.7"
 
-  s.test_files  = Dir.glob('{test}/**/*')
-  s.files       = Dir.glob('{lib}/**/*') + %w[LICENSE README.md]
+  s.test_files  = Dir.glob("{test}/**/*")
+  s.files       = Dir.glob("{lib}/**/*") + %w(LICENSE README.md)
 
-  s.extra_rdoc_files = ['History.md', 'README.md']
+  s.extra_rdoc_files = ["History.md", "README.md"]
 
-  s.require_path = 'lib'
+  s.require_path = "lib"
 
-  s.add_development_dependency('minitest')
-  s.add_development_dependency('rake', '~> 11.3')
+  s.add_development_dependency 'rake', '~> 11.3'
+  s.add_development_dependency 'minitest'
 end

performance/benchmark.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'benchmark/ips'
 require_relative 'theme_runner'
 
@@ -14,7 +12,7 @@ Benchmark.ips do |x|
   puts "Running benchmark for #{x.time} seconds (with #{x.warmup} seconds warmup)."
   puts
 
-  x.report('parse:') { profiler.compile }
-  x.report('render:') { profiler.render }
-  x.report('parse & render:') { profiler.run }
+  x.report("parse:") { profiler.compile }
+  x.report("render:") { profiler.render }
+  x.report("parse & render:") { profiler.run }
 end

performance/memory_profile.rb

@@ -2,25 +2,62 @@
 
 require 'benchmark/ips'
 require 'memory_profiler'
+require 'terminal-table'
 require_relative 'theme_runner'
 
-def profile(phase, &block)
-  puts
-  puts "#{phase}:"
-  puts
+class Profiler
+  LOG_LABEL   = "Profiling: ".rjust(14).freeze
+  REPORTS_DIR = File.expand_path('.memprof', __dir__).freeze
 
-  report = MemoryProfiler.report(&block)
+  def self.run
+    puts
+    yield new
+  end
 
-  report.pretty_print(
-    color_output: true,
-    scale_bytes: true,
-    detailed_report: true
-  )
+  def initialize
+    @allocated = []
+    @retained  = []
+    @headings  = []
+  end
+
+  def profile(phase, &block)
+    print LOG_LABEL
+    print "#{phase}.. ".ljust(10)
+    report = MemoryProfiler.report(&block)
+    puts 'Done.'
+    @headings  << phase.capitalize
+    @allocated << "#{report.scale_bytes(report.total_allocated_memsize)} (#{report.total_allocated} objects)"
+    @retained  << "#{report.scale_bytes(report.total_retained_memsize)} (#{report.total_retained} objects)"
+
+    return if ENV['CI']
+
+    require 'fileutils'
+    report_file = File.join(REPORTS_DIR, "#{sanitize(phase)}.txt")
+    FileUtils.mkdir_p(REPORTS_DIR)
+    report.pretty_print(to_file: report_file, scale_bytes: true)
+  end
+
+  def tabulate
+    table = Terminal::Table.new(headings: @headings.unshift('Phase')) do |t|
+      t << @allocated.unshift('Total allocated')
+      t << @retained.unshift('Total retained')
+    end
+
+    puts
+    puts table
+    puts "\nDetailed report(s) saved to #{REPORTS_DIR}/" unless ENV['CI']
+  end
+
+  def sanitize(string)
+    string.downcase.gsub(/[\W]/, '-').squeeze('-')
+  end
 end
 
 Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 
-profiler = ThemeRunner.new
-
-profile('Parsing') { profiler.compile }
-profile('Rendering') { profiler.render }
+runner = ThemeRunner.new
+Profiler.run do |x|
+  x.profile('parse') { runner.compile }
+  x.profile('render') { runner.render }
+  x.tabulate
+end

performance/profile.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'stackprof'
 require_relative 'theme_runner'
 
@@ -7,7 +5,7 @@ Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 profiler.run
 
-%i[cpu object].each do |profile_type|
+[:cpu, :object].each do |profile_type|
   puts "Profiling in #{profile_type} mode..."
   results = StackProf.run(mode: profile_type) do
     200.times do
@@ -15,12 +13,12 @@ profiler.run
     end
   end
 
-  if profile_type == :cpu && (graph_filename = ENV['GRAPH_FILENAME'])
+  if profile_type == :cpu && graph_filename = ENV['GRAPH_FILENAME']
     File.open(graph_filename, 'w') do |f|
       StackProf::Report.new(results).print_graphviz(nil, f)
     end
   end
 
   StackProf::Report.new(results).print_text(false, 20)
-  File.write(ENV['FILENAME'] + '.' + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
+  File.write(ENV['FILENAME'] + "." + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
 end

performance/shopify/comment_form.rb

@@ -1,16 +1,14 @@
-# frozen_string_literal: true
-
 class CommentForm < Liquid::Block
-  SYNTAX = /(#{Liquid::VARIABLE_SIGNATURE}+)/.freeze
+  Syntax = /(#{Liquid::VariableSignature}+)/
 
   def initialize(tag_name, markup, options)
     super
 
-    if markup =~ SYNTAX
-      @variable_name = Regexp.last_match(1)
+    if markup =~ Syntax
+      @variable_name = $1
       @attributes = {}
     else
-      raise SyntaxError, "Syntax Error in 'comment_form' - Valid syntax: comment_form [article]"
+      raise SyntaxError.new("Syntax Error in 'comment_form' - Valid syntax: comment_form [article]")
     end
   end
 
@@ -22,8 +20,8 @@ class CommentForm < Liquid::Block
         'posted_successfully?' => context.registers[:posted_successfully],
         'errors' => context['comment.errors'],
         'author' => context['comment.author'],
-        'email' => context['comment.email'],
-        'body' => context['comment.body'],
+        'email'  => context['comment.email'],
+        'body'   => context['comment.body']
       }
 
       output << wrap_in_form(article, render_all(@nodelist, context, output))

performance/shopify/database.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'yaml'
 
 module Database
@@ -18,11 +16,8 @@ module Database
       end
 
       # key the tables by handles, as this is how liquid expects it.
-      db = db.each_with_object({}) do |(key, values), assigns|
-        assigns[key] = values.each_with_object({}) do |v, h|
-          h[v['handle']] = v
-          h
-        end
+      db = db.inject({}) do |assigns, (key, values)|
+        assigns[key] = values.inject({}) { |h, v| h[v['handle']] = v; h; }
         assigns
       end
 
@@ -34,9 +29,9 @@ module Database
       db['article']    = db['blog']['articles'].first
 
       db['cart']       = {
-        'total_price' => db['line_items'].values.inject(0) { |sum, item| sum + item['line_price'] * item['quantity'] },
-        'item_count' => db['line_items'].values.inject(0) { |sum, item| sum + item['quantity'] },
-        'items' => db['line_items'].values,
+        'total_price' => db['line_items'].values.inject(0) { |sum, item| sum += item['line_price'] * item['quantity'] },
+        'item_count'  => db['line_items'].values.inject(0) { |sum, item| sum += item['quantity'] },
+        'items'       => db['line_items'].values
       }
 
       db
@@ -45,6 +40,6 @@ module Database
 end
 
 if __FILE__ == $PROGRAM_NAME
-  p(Database.tables['collections']['frontpage'].keys)
+  p Database.tables['collections']['frontpage'].keys
   # p Database.tables['blog']['articles']
 end

performance/shopify/json_filter.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 require 'json'
 
 module JsonFilter
   def json(object)
-    JSON.dump(object.reject { |k, _v| k == 'collections' })
+    JSON.dump(object.reject { |k, v| k == "collections" })
   end
 end

performance/shopify/liquid.rb

@@ -1,6 +1,4 @@
-# frozen_string_literal: true
-
-$LOAD_PATH.unshift(__dir__ + '/../../lib')
+$:.unshift __dir__ + '/../../lib'
 require_relative '../../lib/liquid'
 
 require_relative 'comment_form'
@@ -11,11 +9,11 @@ require_relative 'shop_filter'
 require_relative 'tag_filter'
 require_relative 'weight_filter'
 
-Liquid::Template.register_tag('paginate', Paginate)
-Liquid::Template.register_tag('form', CommentForm)
+Liquid::Template.register_tag 'paginate', Paginate
+Liquid::Template.register_tag 'form', CommentForm
 
-Liquid::Template.register_filter(JsonFilter)
-Liquid::Template.register_filter(MoneyFilter)
-Liquid::Template.register_filter(WeightFilter)
-Liquid::Template.register_filter(ShopFilter)
-Liquid::Template.register_filter(TagFilter)
+Liquid::Template.register_filter JsonFilter
+Liquid::Template.register_filter MoneyFilter
+Liquid::Template.register_filter WeightFilter
+Liquid::Template.register_filter ShopFilter
+Liquid::Template.register_filter TagFilter

performance/shopify/money_filter.rb

@@ -1,16 +1,12 @@
-# frozen_string_literal: true
-
 module MoneyFilter
   def money_with_currency(money)
     return '' if money.nil?
-
-    format('$ %.2f USD', money / 100.0)
+    sprintf("$ %.2f USD", money / 100.0)
   end
 
   def money(money)
     return '' if money.nil?
-
-    format('$ %.2f', money / 100.0)
+    sprintf("$ %.2f", money / 100.0)
   end
 
   private

performance/shopify/paginate.rb

@@ -1,25 +1,23 @@
-# frozen_string_literal: true
-
 class Paginate < Liquid::Block
-  SYNTAX = /(#{Liquid::QUOTED_FRAGMENT})\s*(by\s*(\d+))?/.freeze
+  Syntax     = /(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/
 
   def initialize(tag_name, markup, options)
     super
 
-    if markup =~ SYNTAX
-      @collection_name = Regexp.last_match(1)
-      @page_size = if Regexp.last_match(2)
-        Regexp.last_match(3).to_i
+    if markup =~ Syntax
+      @collection_name = $1
+      @page_size = if $2
+        $3.to_i
       else
         20
       end
 
       @attributes = { 'window_size' => 3 }
-      markup.scan(Liquid::TAG_ATTRIBUTES) do |key, value|
+      markup.scan(Liquid::TagAttributes) do |key, value|
         @attributes[key] = value
       end
     else
-      raise SyntaxError, "Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number"
+      raise SyntaxError.new("Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number")
     end
   end
 
@@ -27,25 +25,25 @@ class Paginate < Liquid::Block
     @context = context
 
     context.stack do
-      current_page = context['current_page'].to_i
+      current_page  = context['current_page'].to_i
 
       pagination = {
-        'page_size' => @page_size,
-        'current_page' => 5,
-        'current_offset' => @page_size * 5,
+        'page_size'      => @page_size,
+        'current_page'   => 5,
+        'current_offset' => @page_size * 5
       }
 
       context['paginate'] = pagination
 
-      collection_size = context[@collection_name].size
+      collection_size  = context[@collection_name].size
 
-      raise ArgumentError, "Cannot paginate array '#{@collection_name}'. Not found." if collection_size.nil?
+      raise ArgumentError.new("Cannot paginate array '#{@collection_name}'. Not found.") if collection_size.nil?
 
       page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1
 
       pagination['items']      = collection_size
       pagination['pages']      = page_count - 1
-      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless current_page <= 1
+      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
       pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
       pagination['parts']      = []
 
@@ -61,7 +59,6 @@ class Paginate < Liquid::Block
             pagination['parts'] << link(page, page)
           elsif page <= current_page - @attributes['window_size'] || page >= current_page + @attributes['window_size']
             next if hellip_break
-
             pagination['parts'] << no_link('&hellip;')
             hellip_break = true
             next
@@ -88,6 +85,6 @@ class Paginate < Liquid::Block
   end
 
   def current_url
-    '/collections/frontpage'
+    "/collections/frontpage"
   end
 end

performance/shopify/shop_filter.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module ShopFilter
   def asset_url(input)
     "/files/1/[shop_id]/[shop_id]/assets/#{input}"
@@ -17,15 +15,15 @@ module ShopFilter
     %(<script src="#{url}" type="text/javascript"></script>)
   end
 
-  def stylesheet_tag(url, media = 'all')
+  def stylesheet_tag(url, media = "all")
     %(<link href="#{url}" rel="stylesheet" type="text/css"  media="#{media}"  />)
   end
 
-  def link_to(link, url, title = '')
+  def link_to(link, url, title = "")
     %(<a href="#{url}" title="#{title}">#{link}</a>)
   end
 
-  def img_tag(url, alt = '')
+  def img_tag(url, alt = "")
     %(<img src="#{url}" alt="#{alt}" />)
   end
 
@@ -54,13 +52,15 @@ module ShopFilter
   end
 
   def product_img_url(url, style = 'small')
-    raise ArgumentError, 'filter "size" can only be called on product images' unless url =~ %r{\Aproducts/([\w\-\_]+)\.(\w{2,4})}
+    unless url =~ /\Aproducts\/([\w\-\_]+)\.(\w{2,4})/
+      raise ArgumentError, 'filter "size" can only be called on product images'
+    end
 
     case style
     when 'original'
       return '/files/shops/random_number/' + url
     when 'grande', 'large', 'medium', 'compact', 'small', 'thumb', 'icon'
-      "/files/shops/random_number/products/#{Regexp.last_match(1)}_#{style}.#{Regexp.last_match(2)}"
+      "/files/shops/random_number/products/#{$1}_#{style}.#{$2}"
     else
       raise ArgumentError, 'valid parameters for filter "size" are: original, grande, large, medium, compact, small, thumb and icon '
     end
@@ -70,14 +70,16 @@ module ShopFilter
     html = []
     html << %(<span class="prev">#{link_to(paginate['previous']['title'], paginate['previous']['url'])}</span>) if paginate['previous']
 
-    paginate['parts'].each do |part|
-      html << if part['is_link']
-        %(<span class="page">#{link_to(part['title'], part['url'])}</span>)
+    for part in paginate['parts']
+
+      if part['is_link']
+        html << %(<span class="page">#{link_to(part['title'], part['url'])}</span>)
       elsif part['title'].to_i == paginate['current_page'].to_i
-        %(<span class="page current">#{part['title']}</span>)
+        html << %(<span class="page current">#{part['title']}</span>)
       else
-        %(<span class="deco">#{part['title']}</span>)
+        html << %(<span class="deco">#{part['title']}</span>)
       end
+
     end
 
     html << %(<span class="next">#{link_to(paginate['next']['title'], paginate['next']['url'])}</span>) if paginate['next']

performance/shopify/tag_filter.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 module TagFilter
   def link_to_tag(label, tag)
     "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tag}\">#{label}</a>"
@@ -15,11 +13,11 @@ module TagFilter
 
   def link_to_add_tag(label, tag)
     tags = (@context['current_tags'] + [tag]).uniq
-    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join('+')}\">#{label}</a>"
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
   end
 
   def link_to_remove_tag(label, tag)
     tags = (@context['current_tags'] - [tag]).uniq
-    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join('+')}\">#{label}</a>"
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
   end
 end

performance/shopify/weight_filter.rb

@@ -1,8 +1,6 @@
-# frozen_string_literal: true
-
 module WeightFilter
   def weight(grams)
-    format('%.2f', grams / 1000)
+    sprintf("%.2f", grams / 1000)
   end
 
   def weight_with_unit(grams)

performance/theme_runner.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 # This profiler run simulates Shopify.
 # We are looking in the tests directory for liquid files and render them within the designated layout file.
 # We will also export a substantial database to liquid which the templates can render values of.
@@ -33,7 +31,7 @@ class ThemeRunner
       {
         liquid: File.read(test),
         layout: (File.file?(theme_path) ? File.read(theme_path) : nil),
-        template_name: test,
+        template_name: test
       }
     end.compact
 

test/integration/assign_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class AssignTest < Minitest::Test
@@ -12,29 +10,29 @@ class AssignTest < Minitest::Test
     END_TEMPLATE
     template = Template.parse(template_source)
     rendered = template.render!
-    assert_equal 'Print this-thing', rendered.strip
+    assert_equal "Print this-thing", rendered.strip
   end
 
   def test_assigned_variable
     assert_template_result('.foo.',
-                           '{% assign foo = values %}.{{ foo[0] }}.',
-                           'values' => %w[foo bar baz])
+      '{% assign foo = values %}.{{ foo[0] }}.',
+      'values' => %w(foo bar baz))
 
     assert_template_result('.bar.',
-                           '{% assign foo = values %}.{{ foo[1] }}.',
-                           'values' => %w[foo bar baz])
+      '{% assign foo = values %}.{{ foo[1] }}.',
+      'values' => %w(foo bar baz))
   end
 
   def test_assign_with_filter
     assert_template_result('.bar.',
-                           '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
-                           'values' => 'foo,bar,baz')
+      '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
+      'values' => "foo,bar,baz")
   end
 
   def test_assign_syntax_error
     assert_match_syntax_error(/assign/,
-                              '{% assign foo not values %}.',
-                              'values' => 'foo,bar,baz')
+      '{% assign foo not values %}.',
+      'values' => "foo,bar,baz")
   end
 
   def test_assign_uses_error_mode

test/integration/blank_test.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class FoobarTag < Liquid::Tag
-  def render_to_output_buffer(_context, output)
+  def render_to_output_buffer(context, output)
     output << ' '
     output
   end
@@ -33,77 +31,77 @@ class BlankTest < Minitest::Test
 
   def test_new_tags_are_not_blank_by_default
     with_custom_tag('foobar', FoobarTag) do
-      assert_template_result(' ' * N, wrap_in_for('{% foobar %}'))
+      assert_template_result(" " * N, wrap_in_for("{% foobar %}"))
     end
   end
 
   def test_loops_are_blank
-    assert_template_result('', wrap_in_for(' '))
+    assert_template_result("", wrap_in_for(" "))
   end
 
   def test_if_else_are_blank
-    assert_template_result('', '{% if true %} {% elsif false %} {% else %} {% endif %}')
+    assert_template_result("", "{% if true %} {% elsif false %} {% else %} {% endif %}")
   end
 
   def test_unless_is_blank
-    assert_template_result('', wrap('{% unless true %} {% endunless %}'))
+    assert_template_result("", wrap("{% unless true %} {% endunless %}"))
   end
 
   def test_mark_as_blank_only_during_parsing
-    assert_template_result(' ' * (N + 1), wrap(' {% if false %} this never happens, but still, this block is not blank {% endif %}'))
+    assert_template_result(" " * (N + 1), wrap(" {% if false %} this never happens, but still, this block is not blank {% endif %}"))
   end
 
   def test_comments_are_blank
-    assert_template_result('', wrap(' {% comment %} whatever {% endcomment %} '))
+    assert_template_result("", wrap(" {% comment %} whatever {% endcomment %} "))
   end
 
   def test_captures_are_blank
-    assert_template_result('', wrap(' {% capture foo %} whatever {% endcapture %} '))
+    assert_template_result("", wrap(" {% capture foo %} whatever {% endcapture %} "))
   end
 
   def test_nested_blocks_are_blank_but_only_if_all_children_are
-    assert_template_result('', wrap(wrap(' ')))
+    assert_template_result("", wrap(wrap(" ")))
     assert_template_result("\n       but this is not " * (N + 1),
-                           wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
+      wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
       {% if true %} but this is not {% endif %}'))
   end
 
   def test_assigns_are_blank
-    assert_template_result('', wrap(' {% assign foo = "bar" %} '))
+    assert_template_result("", wrap(' {% assign foo = "bar" %} '))
   end
 
   def test_whitespace_is_blank
-    assert_template_result('', wrap(' '))
-    assert_template_result('', wrap("\t"))
+    assert_template_result("", wrap(" "))
+    assert_template_result("", wrap("\t"))
   end
 
   def test_whitespace_is_not_blank_if_other_stuff_is_present
-    body = '     x '
+    body = "     x "
     assert_template_result(body * (N + 1), wrap(body))
   end
 
   def test_increment_is_not_blank
-    assert_template_result(' 0' * 2 * (N + 1), wrap('{% assign foo = 0 %} {% increment foo %} {% decrement foo %}'))
+    assert_template_result(" 0" * 2 * (N + 1), wrap("{% assign foo = 0 %} {% increment foo %} {% decrement foo %}"))
   end
 
   def test_cycle_is_not_blank
-    assert_template_result('  ' * ((N + 1) / 2) + ' ', wrap("{% cycle ' ', ' ' %}"))
+    assert_template_result("  " * ((N + 1) / 2) + " ", wrap("{% cycle ' ', ' ' %}"))
   end
 
   def test_raw_is_not_blank
-    assert_template_result('  ' * (N + 1), wrap(' {% raw %} {% endraw %}'))
+    assert_template_result("  " * (N + 1), wrap(" {% raw %} {% endraw %}"))
   end
 
   def test_include_is_blank
     Liquid::Template.file_system = BlankTestFileSystem.new
-    assert_template_result 'foobar' * (N + 1), wrap("{% include 'foobar' %}")
-    assert_template_result ' foobar ' * (N + 1), wrap("{% include ' foobar ' %}")
-    assert_template_result '   ' * (N + 1), wrap(" {% include ' ' %} ")
+    assert_template_result "foobar" * (N + 1), wrap("{% include 'foobar' %}")
+    assert_template_result " foobar " * (N + 1), wrap("{% include ' foobar ' %}")
+    assert_template_result "   " * (N + 1), wrap(" {% include ' ' %} ")
   end
 
   def test_case_is_blank
-    assert_template_result('', wrap(" {% assign foo = 'bar' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
-    assert_template_result('', wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
-    assert_template_result('   x  ' * (N + 1), wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} x {% endcase %} "))
+    assert_template_result("", wrap(" {% assign foo = 'bar' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
+    assert_template_result("", wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
+    assert_template_result("   x  " * (N + 1), wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} x {% endcase %} "))
   end
 end

test/integration/block_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class BlockTest < Minitest::Test
@@ -7,7 +5,7 @@ class BlockTest < Minitest::Test
 
   def test_unexpected_end_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse('{% if true %}{% endunless %}')
+      Template.parse("{% if true %}{% endunless %}")
     end
     assert_equal exc.message, "Liquid syntax error: 'endunless' is not a valid delimiter for if tags. use endif"
   end

test/integration/capture_test.rb

@@ -1,12 +1,10 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class CaptureTest < Minitest::Test
   include Liquid
 
   def test_captures_block_content_in_variable
-    assert_template_result('test string', "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
+    assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
   end
 
   def test_capture_with_hyphen_in_variable_name
@@ -16,7 +14,7 @@ class CaptureTest < Minitest::Test
     END_TEMPLATE
     template = Template.parse(template_source)
     rendered = template.render!
-    assert_equal 'Print this-thing', rendered.strip
+    assert_equal "Print this-thing", rendered.strip
   end
 
   def test_capture_to_variable_from_outer_scope_if_existing
@@ -32,7 +30,7 @@ class CaptureTest < Minitest::Test
     END_TEMPLATE
     template = Template.parse(template_source)
     rendered = template.render!
-    assert_equal 'test-string', rendered.gsub(/\s/, '')
+    assert_equal "test-string", rendered.gsub(/\s/, '')
   end
 
   def test_assigning_from_capture
@@ -47,6 +45,6 @@ class CaptureTest < Minitest::Test
     END_TEMPLATE
     template = Template.parse(template_source)
     rendered = template.render!
-    assert_equal '3-3', rendered.gsub(/\s/, '')
+    assert_equal "3-3", rendered.gsub(/\s/, '')
   end
 end # CaptureTest

test/integration/context_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ContextTest < Minitest::Test

test/integration/document_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class DocumentTest < Minitest::Test
@@ -7,14 +5,14 @@ class DocumentTest < Minitest::Test
 
   def test_unexpected_outer_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse('{% else %}')
+      Template.parse("{% else %}")
     end
     assert_equal exc.message, "Liquid syntax error: Unexpected outer 'else' tag"
   end
 
   def test_unknown_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse('{% foo %}')
+      Template.parse("{% foo %}")
     end
     assert_equal exc.message, "Liquid syntax error: Unknown tag 'foo'"
   end

test/integration/drop_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ContextDrop < Liquid::Drop
@@ -23,7 +21,7 @@ end
 class ProductDrop < Liquid::Drop
   class TextDrop < Liquid::Drop
     def array
-      %w[text1 text2]
+      ['text1', 'text2']
     end
 
     def text
@@ -33,7 +31,7 @@ class ProductDrop < Liquid::Drop
 
   class CatchallDrop < Liquid::Drop
     def liquid_method_missing(method)
-      +'catchall_method: ' << method.to_s
+      'catchall_method: ' << method.to_s
     end
   end
 
@@ -50,13 +48,13 @@ class ProductDrop < Liquid::Drop
   end
 
   def user_input
-    (+'foo').taint
+    "foo".taint
   end
 
   protected
 
   def callmenot
-    'protected'
+    "protected"
   end
 end
 
@@ -141,17 +139,17 @@ class DropsTest < Minitest::Test
   end
 
   def test_drop_does_only_respond_to_whitelisted_methods
-    assert_equal '', Liquid::Template.parse('{{ product.inspect }}').render!('product' => ProductDrop.new)
-    assert_equal '', Liquid::Template.parse('{{ product.pretty_inspect }}').render!('product' => ProductDrop.new)
-    assert_equal '', Liquid::Template.parse('{{ product.whatever }}').render!('product' => ProductDrop.new)
-    assert_equal '', Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new)
-    assert_equal '', Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new)
-    assert_equal '', Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse("{{ product.inspect }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse("{{ product.pretty_inspect }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse("{{ product.whatever }}").render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal "", Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new)
   end
 
   def test_drops_respond_to_to_liquid
-    assert_equal 'text1', Liquid::Template.parse('{{ product.to_liquid.texts.text }}').render!('product' => ProductDrop.new)
-    assert_equal 'text1', Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new)
+    assert_equal "text1", Liquid::Template.parse("{{ product.to_liquid.texts.text }}").render!('product' => ProductDrop.new)
+    assert_equal "text1", Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new)
   end
 
   def test_text_drop
@@ -175,12 +173,12 @@ class DropsTest < Minitest::Test
   end
 
   def test_context_drop
-    output = Liquid::Template.parse(' {{ context.bar }} ').render!('context' => ContextDrop.new, 'bar' => 'carrot')
+    output = Liquid::Template.parse(' {{ context.bar }} ').render!('context' => ContextDrop.new, 'bar' => "carrot")
     assert_equal ' carrot ', output
   end
 
   def test_nested_context_drop
-    output = Liquid::Template.parse(' {{ product.context.foo }} ').render!('product' => ProductDrop.new, 'foo' => 'monkey')
+    output = Liquid::Template.parse(' {{ product.context.foo }} ').render!('product' => ProductDrop.new, 'foo' => "monkey")
     assert_equal ' monkey ', output
   end
 
@@ -190,7 +188,7 @@ class DropsTest < Minitest::Test
   end
 
   def test_object_methods_not_allowed
-    %i[dup clone singleton_class eval class_eval inspect].each do |method|
+    [:dup, :clone, :singleton_class, :eval, :class_eval, :inspect].each do |method|
       output = Liquid::Template.parse(" {{ product.#{method} }} ").render!('product' => ProductDrop.new)
       assert_equal '  ', output
     end
@@ -203,9 +201,9 @@ class DropsTest < Minitest::Test
   end
 
   def test_scope_though_proc
-    assert_equal '1', Liquid::Template.parse('{{ s }}').render!('context' => ContextDrop.new, 's' => proc { |c| c['context.scopes'] })
-    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ s }}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc { |c| c['context.scopes'] }, 'dummy' => [1])
-    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc { |c| c['context.scopes'] }, 'dummy' => [1])
+    assert_equal '1', Liquid::Template.parse('{{ s }}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] })
+    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ s }}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
+    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
   end
 
   def test_scope_with_assigns
@@ -234,7 +232,7 @@ class DropsTest < Minitest::Test
   end
 
   def test_enumerable_drop_will_invoke_liquid_method_missing_for_clashing_method_names
-    %w[select each map cycle].each do |method|
+    ["select", "each", "map", "cycle"].each do |method|
       assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
       assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
       assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
@@ -243,20 +241,20 @@ class DropsTest < Minitest::Test
   end
 
   def test_some_enumerable_methods_still_get_invoked
-    %i[count max].each do |method|
-      assert_equal '3', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal '3', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal '3', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
-      assert_equal '3', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
+    [ :count, :max ].each do |method|
+      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
 
-    assert_equal 'yes', Liquid::Template.parse('{% if collection contains 3 %}yes{% endif %}').render!('collection' => RealEnumerableDrop.new)
+    assert_equal "yes", Liquid::Template.parse("{% if collection contains 3 %}yes{% endif %}").render!('collection' => RealEnumerableDrop.new)
 
-    %i[min first].each do |method|
-      assert_equal '1', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal '1', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal '1', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
-      assert_equal '1', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
+    [ :min, :first ].each do |method|
+      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
   end
 
@@ -269,7 +267,7 @@ class DropsTest < Minitest::Test
   end
 
   def test_default_to_s_on_drops
-    assert_equal 'ProductDrop', Liquid::Template.parse('{{ product }}').render!('product' => ProductDrop.new)
+    assert_equal 'ProductDrop', Liquid::Template.parse("{{ product }}").render!('product' => ProductDrop.new)
     assert_equal 'EnumerableDrop', Liquid::Template.parse('{{ collection }}').render!('collection' => EnumerableDrop.new)
   end
 end # DropsTest

test/integration/error_handling_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ErrorHandlingTest < Minitest::Test
@@ -85,14 +83,15 @@ class ErrorHandlingTest < Minitest::Test
 
   def test_with_line_numbers_adds_numbers_to_parser_errors
     err = assert_raises(SyntaxError) do
-      Liquid::Template.parse('
+      Liquid::Template.parse(%q(
           foobar
 
           {% "cat" | foobar %}
 
           bla
-        ',
-                             line_numbers: true)
+        ),
+        line_numbers: true
+      )
     end
 
     assert_match(/Liquid syntax error \(line 4\)/, err.message)
@@ -100,14 +99,15 @@ class ErrorHandlingTest < Minitest::Test
 
   def test_with_line_numbers_adds_numbers_to_parser_errors_with_whitespace_trim
     err = assert_raises(SyntaxError) do
-      Liquid::Template.parse('
+      Liquid::Template.parse(%q(
           foobar
 
           {%- "cat" | foobar -%}
 
           bla
-        ',
-                             line_numbers: true)
+        ),
+        line_numbers: true
+      )
     end
 
     assert_match(/Liquid syntax error \(line 4\)/, err.message)
@@ -121,11 +121,12 @@ class ErrorHandlingTest < Minitest::Test
 
         bla
             ',
-                                      error_mode: :warn,
-                                      line_numbers: true)
+      error_mode: :warn,
+      line_numbers: true
+    )
 
     assert_equal ['Liquid syntax error (line 4): Unexpected character = in "1 =! 2"'],
-                 template.warnings.map(&:message)
+      template.warnings.map(&:message)
   end
 
   def test_parsing_strict_with_line_numbers_adds_numbers_to_lexer_errors
@@ -137,8 +138,9 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
                 ',
-                             error_mode: :strict,
-                             line_numbers: true)
+        error_mode: :strict,
+        line_numbers: true
+      )
     end
 
     assert_equal 'Liquid syntax error (line 4): Unexpected character = in "1 =! 2"', err.message
@@ -155,7 +157,8 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
                 ',
-                             line_numbers: true)
+        line_numbers: true
+      )
     end
 
     assert_equal "Liquid syntax error (line 5): Unknown tag 'foo'", err.message
@@ -202,7 +205,7 @@ class ErrorHandlingTest < Minitest::Test
   def test_default_exception_renderer_with_internal_error
     template = Liquid::Template.parse('This is a runtime error: {{ errors.runtime_error }}', line_numbers: true)
 
-    output = template.render('errors' => ErrorDrop.new)
+    output = template.render({ 'errors' => ErrorDrop.new })
 
     assert_equal 'This is a runtime error: Liquid error (line 1): internal', output
     assert_equal [Liquid::InternalError], template.errors.map(&:class)
@@ -211,13 +214,10 @@ class ErrorHandlingTest < Minitest::Test
   def test_setting_default_exception_renderer
     old_exception_renderer = Liquid::Template.default_exception_renderer
     exceptions = []
-    Liquid::Template.default_exception_renderer = lambda { |e|
-      exceptions << e
-      ''
-    }
+    Liquid::Template.default_exception_renderer = ->(e) { exceptions << e; '' }
     template = Liquid::Template.parse('This is a runtime error: {{ errors.argument_error }}')
 
-    output = template.render('errors' => ErrorDrop.new)
+    output = template.render({ 'errors' => ErrorDrop.new })
 
     assert_equal 'This is a runtime error: ', output
     assert_equal [Liquid::ArgumentError], template.errors.map(&:class)
@@ -228,10 +228,7 @@ class ErrorHandlingTest < Minitest::Test
   def test_exception_renderer_exposing_non_liquid_error
     template = Liquid::Template.parse('This is a runtime error: {{ errors.runtime_error }}', line_numbers: true)
     exceptions = []
-    handler = lambda { |e|
-      exceptions << e
-      e.cause
-    }
+    handler = ->(e) { exceptions << e; e.cause }
 
     output = template.render({ 'errors' => ErrorDrop.new }, exception_renderer: handler)
 
@@ -242,8 +239,8 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   class TestFileSystem
-    def read_template_file(_template_path)
-      '{{ errors.argument_error }}'
+    def read_template_file(template_path)
+      "{{ errors.argument_error }}"
     end
   end
 
@@ -258,6 +255,6 @@ class ErrorHandlingTest < Minitest::Test
       Liquid::Template.file_system = old_file_system
     end
     assert_equal "Argument error:\nLiquid error (product line 1): argument error", page
-    assert_equal 'product', template.errors.first.template_name
+    assert_equal "product", template.errors.first.template_name
   end
 end

test/integration/filter_test.rb

@@ -1,26 +1,24 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 module MoneyFilter
   def money(input)
-    format(' %d$ ', input)
+    sprintf(' %d$ ', input)
   end
 
   def money_with_underscore(input)
-    format(' %d$ ', input)
+    sprintf(' %d$ ', input)
   end
 end
 
 module CanadianMoneyFilter
   def money(input)
-    format(' %d$ CAD ', input)
+    sprintf(' %d$ CAD ', input)
   end
 end
 
 module SubstituteFilter
   def substitute(input, params = {})
-    input.gsub(/%\{(\w+)\}/) { |_match| params[Regexp.last_match(1)] }
+    input.gsub(/%\{(\w+)\}/) { |match| params[$1] }
   end
 end
 
@@ -28,8 +26,8 @@ class FiltersTest < Minitest::Test
   include Liquid
 
   module OverrideObjectMethodFilter
-    def tap(_input)
-      'tap overridden'
+    def tap(input)
+      "tap overridden"
     end
   end
 
@@ -41,13 +39,13 @@ class FiltersTest < Minitest::Test
     @context['var'] = 1000
     @context.add_filters(MoneyFilter)
 
-    assert_equal ' 1000$ ', Template.parse('{{var | money}}').render(@context)
+    assert_equal ' 1000$ ', Template.parse("{{var | money}}").render(@context)
   end
 
   def test_underscore_in_filter_name
     @context['var'] = 1000
     @context.add_filters(MoneyFilter)
-    assert_equal ' 1000$ ', Template.parse('{{var | money_with_underscore}}').render(@context)
+    assert_equal ' 1000$ ', Template.parse("{{var | money_with_underscore}}").render(@context)
   end
 
   def test_second_filter_overwrites_first
@@ -55,43 +53,43 @@ class FiltersTest < Minitest::Test
     @context.add_filters(MoneyFilter)
     @context.add_filters(CanadianMoneyFilter)
 
-    assert_equal ' 1000$ CAD ', Template.parse('{{var | money}}').render(@context)
+    assert_equal ' 1000$ CAD ', Template.parse("{{var | money}}").render(@context)
   end
 
   def test_size
     @context['var'] = 'abcd'
     @context.add_filters(MoneyFilter)
 
-    assert_equal '4', Template.parse('{{var | size}}').render(@context)
+    assert_equal '4', Template.parse("{{var | size}}").render(@context)
   end
 
   def test_join
     @context['var'] = [1, 2, 3, 4]
 
-    assert_equal '1 2 3 4', Template.parse('{{var | join}}').render(@context)
+    assert_equal "1 2 3 4", Template.parse("{{var | join}}").render(@context)
   end
 
   def test_sort
     @context['value'] = 3
     @context['numbers'] = [2, 1, 4, 3]
-    @context['words'] = %w[expected as alphabetic]
-    @context['arrays'] = %w[flower are]
-    @context['case_sensitive'] = %w[sensitive Expected case]
+    @context['words'] = ['expected', 'as', 'alphabetic']
+    @context['arrays'] = ['flower', 'are']
+    @context['case_sensitive'] = ['sensitive', 'Expected', 'case']
 
-    assert_equal '1 2 3 4', Template.parse('{{numbers | sort | join}}').render(@context)
-    assert_equal 'alphabetic as expected', Template.parse('{{words | sort | join}}').render(@context)
-    assert_equal '3', Template.parse('{{value | sort}}').render(@context)
-    assert_equal 'are flower', Template.parse('{{arrays | sort | join}}').render(@context)
-    assert_equal 'Expected case sensitive', Template.parse('{{case_sensitive | sort | join}}').render(@context)
+    assert_equal '1 2 3 4', Template.parse("{{numbers | sort | join}}").render(@context)
+    assert_equal 'alphabetic as expected', Template.parse("{{words | sort | join}}").render(@context)
+    assert_equal '3', Template.parse("{{value | sort}}").render(@context)
+    assert_equal 'are flower', Template.parse("{{arrays | sort | join}}").render(@context)
+    assert_equal 'Expected case sensitive', Template.parse("{{case_sensitive | sort | join}}").render(@context)
   end
 
   def test_sort_natural
-    @context['words'] = %w[case Assert Insensitive]
+    @context['words'] = ['case', 'Assert', 'Insensitive']
     @context['hashes'] = [{ 'a' => 'A' }, { 'a' => 'b' }, { 'a' => 'C' }]
     @context['objects'] = [TestObject.new('A'), TestObject.new('b'), TestObject.new('C')]
 
     # Test strings
-    assert_equal 'Assert case Insensitive', Template.parse('{{words | sort_natural | join}}').render(@context)
+    assert_equal 'Assert case Insensitive', Template.parse("{{words | sort_natural | join}}").render(@context)
 
     # Test hashes
     assert_equal 'A b C', Template.parse("{{hashes | sort_natural: 'a' | map: 'a' | join}}").render(@context)
@@ -106,7 +104,7 @@ class FiltersTest < Minitest::Test
     @context['objects'] = [TestObject.new('A'), TestObject.new(nil), TestObject.new('C')]
 
     # Test strings
-    assert_equal 'a b c', Template.parse('{{words | compact | join}}').render(@context)
+    assert_equal 'a b c', Template.parse("{{words | compact | join}}").render(@context)
 
     # Test hashes
     assert_equal 'A C', Template.parse("{{hashes | compact: 'a' | map: 'a' | join}}").render(@context)
@@ -116,27 +114,27 @@ class FiltersTest < Minitest::Test
   end
 
   def test_strip_html
-    @context['var'] = '<b>bla blub</a>'
+    @context['var'] = "<b>bla blub</a>"
 
-    assert_equal 'bla blub', Template.parse('{{ var | strip_html }}').render(@context)
+    assert_equal "bla blub", Template.parse("{{ var | strip_html }}").render(@context)
   end
 
   def test_strip_html_ignore_comments_with_html
-    @context['var'] = '<!-- split and some <ul> tag --><b>bla blub</a>'
+    @context['var'] = "<!-- split and some <ul> tag --><b>bla blub</a>"
 
-    assert_equal 'bla blub', Template.parse('{{ var | strip_html }}').render(@context)
+    assert_equal "bla blub", Template.parse("{{ var | strip_html }}").render(@context)
   end
 
   def test_capitalize
-    @context['var'] = 'blub'
+    @context['var'] = "blub"
 
-    assert_equal 'Blub', Template.parse('{{ var | capitalize }}').render(@context)
+    assert_equal "Blub", Template.parse("{{ var | capitalize }}").render(@context)
   end
 
   def test_nonexistent_filter_is_ignored
     @context['var'] = 1000
 
-    assert_equal '1000', Template.parse('{{ var | xyzzy }}').render(@context)
+    assert_equal '1000', Template.parse("{{ var | xyzzy }}").render(@context)
   end
 
   def test_filter_with_keyword_arguments
@@ -148,10 +146,10 @@ class FiltersTest < Minitest::Test
   end
 
   def test_override_object_method_in_filter
-    assert_equal 'tap overridden', Template.parse('{{var | tap}}').render!({ 'var' => 1000 }, filters: [OverrideObjectMethodFilter])
+    assert_equal "tap overridden", Template.parse("{{var | tap}}").render!({ 'var' => 1000 }, filters: [OverrideObjectMethodFilter])
 
     # tap still treated as a non-existent filter
-    assert_equal '1000', Template.parse('{{var | tap}}').render!('var' => 1000)
+    assert_equal "1000", Template.parse("{{var | tap}}").render!({ 'var' => 1000 })
   end
 end
 
@@ -160,15 +158,15 @@ class FiltersInTemplate < Minitest::Test
 
   def test_local_global
     with_global_filter(MoneyFilter) do
-      assert_equal ' 1000$ ', Template.parse('{{1000 | money}}').render!(nil, nil)
-      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, filters: CanadianMoneyFilter)
-      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, filters: [CanadianMoneyFilter])
+      assert_equal " 1000$ ", Template.parse("{{1000 | money}}").render!(nil, nil)
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: CanadianMoneyFilter)
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: [CanadianMoneyFilter])
     end
   end
 
   def test_local_filter_with_deprecated_syntax
-    assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, CanadianMoneyFilter)
-    assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, [CanadianMoneyFilter])
+    assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, CanadianMoneyFilter)
+    assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, [CanadianMoneyFilter])
   end
 end # FiltersTest
 

test/integration/hash_ordering_test.rb

@@ -1,17 +1,15 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class HashOrderingTest < Minitest::Test
   module MoneyFilter
     def money(input)
-      format(' %d$ ', input)
+      sprintf(' %d$ ', input)
     end
   end
 
   module CanadianMoneyFilter
     def money(input)
-      format(' %d$ CAD ', input)
+      sprintf(' %d$ CAD ', input)
     end
   end
 
@@ -19,7 +17,7 @@ class HashOrderingTest < Minitest::Test
 
   def test_global_register_order
     with_global_filter(MoneyFilter, CanadianMoneyFilter) do
-      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render(nil, nil)
+      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render(nil, nil)
     end
   end
 end

test/integration/legacy_test.rb

@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-require 'liquid/legacy'
-
-class FiltersTest < Minitest::Test
-  include Liquid
-
-  def test_constants
-    assert_equal Liquid::FilterSeparator, Liquid::FILTER_SEPARATOR
-    assert_equal Liquid::BlockBody::ContentOfVariable, Liquid::BlockBody::CONTENT_OF_VARIABLE
-  end
-end

test/integration/output_test.rb

@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 module FunnyFilter
-  def make_funny(_input)
+  def make_funny(input)
     'LOL'
   end
 
@@ -11,11 +9,11 @@ module FunnyFilter
     "LOL: #{input}"
   end
 
-  def add_smiley(input, smiley = ':-)')
+  def add_smiley(input, smiley = ":-)")
     "#{input} #{smiley}"
   end
 
-  def add_tag(input, tag = 'p', id = 'foo')
+  def add_tag(input, tag = "p", id = "foo")
     %(<#{tag} id="#{id}">#{input}</#{tag}>)
   end
 
@@ -34,7 +32,7 @@ class OutputTest < Minitest::Test
   def setup
     @assigns = {
       'best_cars' => 'bmw',
-      'car' => { 'bmw' => 'good', 'gm' => 'bad' },
+      'car' => { 'bmw' => 'good', 'gm' => 'bad' }
     }
   end
 
@@ -47,9 +45,9 @@ class OutputTest < Minitest::Test
 
   def test_variable_traversing_with_two_brackets
     text = %({{ site.data.menu[include.menu][include.locale] }})
-    assert_equal 'it works!', Template.parse(text).render!(
-      'site' => { 'data' => { 'menu' => { 'foo' => { 'bar' => 'it works!' } } } },
-      'include' => { 'menu' => 'foo', 'locale' => 'bar' }
+    assert_equal "it works!", Template.parse(text).render!(
+      "site" => { "data" => { "menu" => { "foo" => { "bar" => "it works!" } } } },
+      "include" => { "menu" => "foo", "locale" => "bar" }
     )
   end
 

test/integration/parse_tree_visitor_test.rb

@@ -7,217 +7,217 @@ class ParseTreeVisitorTest < Minitest::Test
 
   def test_variable
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({{ test }}))
     )
   end
 
   def test_varible_with_filter
     assert_equal(
-      %w[test infilter],
+      ["test", "infilter"],
       visit(%({{ test | split: infilter }}))
     )
   end
 
   def test_dynamic_variable
     assert_equal(
-      %w[test inlookup],
+      ["test", "inlookup"],
       visit(%({{ test[inlookup] }}))
     )
   end
 
   def test_if_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if test %}{% endif %}))
     )
   end
 
   def test_complex_if_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 and 2 == test %}{% endif %}))
     )
   end
 
   def test_if_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 %}{{ test }}{% endif %}))
     )
   end
 
   def test_unless_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% unless test %}{% endunless %}))
     )
   end
 
   def test_complex_unless_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% unless 1 == 1 and 2 == test %}{% endunless %}))
     )
   end
 
   def test_unless_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% unless 1 == 1 %}{{ test }}{% endunless %}))
     )
   end
 
   def test_elsif_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 %}{% elsif test %}{% endif %}))
     )
   end
 
   def test_complex_elsif_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 %}{% elsif 1 == 1 and 2 == test %}{% endif %}))
     )
   end
 
   def test_elsif_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 %}{% elsif 2 == 2 %}{{ test }}{% endif %}))
     )
   end
 
   def test_else_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% if 1 == 1 %}{% else %}{{ test }}{% endif %}))
     )
   end
 
   def test_case_left
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% case test %}{% endcase %}))
     )
   end
 
   def test_case_condition
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% case 1 %}{% when test %}{% endcase %}))
     )
   end
 
   def test_case_when_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% case 1 %}{% when 2 %}{{ test }}{% endcase %}))
     )
   end
 
   def test_case_else_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% case 1 %}{% else %}{{ test }}{% endcase %}))
     )
   end
 
   def test_for_in
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% for x in test %}{% endfor %}))
     )
   end
 
   def test_for_limit
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% for x in (1..5) limit: test %}{% endfor %}))
     )
   end
 
   def test_for_offset
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% for x in (1..5) offset: test %}{% endfor %}))
     )
   end
 
   def test_for_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% for x in (1..5) %}{{ test }}{% endfor %}))
     )
   end
 
   def test_tablerow_in
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% tablerow x in test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_limit
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% tablerow x in (1..5) limit: test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_offset
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% tablerow x in (1..5) offset: test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_body
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% tablerow x in (1..5) %}{{ test }}{% endtablerow %}))
     )
   end
 
   def test_cycle
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% cycle test %}))
     )
   end
 
   def test_assign
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% assign x = test %}))
     )
   end
 
   def test_capture
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% capture x %}{{ test }}{% endcapture %}))
     )
   end
 
   def test_include
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% include test %}))
     )
   end
 
   def test_include_with
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% include "hai" with test %}))
     )
   end
 
   def test_include_for
     assert_equal(
-      ['test'],
+      ["test"],
       visit(%({% include "hai" for test %}))
     )
   end
@@ -225,9 +225,9 @@ class ParseTreeVisitorTest < Minitest::Test
   def test_preserve_tree_structure
     assert_equal(
       [[nil, [
-        [nil, [[nil, [['other', []]]]]],
-        ['test', []],
-        ['xs', []],
+        [nil, [[nil, [["other", []]]]]],
+        ["test", []],
+        ["xs", []]
       ]]],
       traversal(%({% for x in xs offset: test %}{{ other }}{% endfor %})).visit
     )

test/integration/parsing_quirks_test.rb

@@ -1,43 +1,41 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ParsingQuirksTest < Minitest::Test
   include Liquid
 
   def test_parsing_css
-    text = ' div { font-weight: bold; } '
+    text = " div { font-weight: bold; } "
     assert_equal text, Template.parse(text).render!
   end
 
   def test_raise_on_single_close_bracet
     assert_raises(SyntaxError) do
-      Template.parse('text {{method} oh nos!')
+      Template.parse("text {{method} oh nos!")
     end
   end
 
   def test_raise_on_label_and_no_close_bracets
     assert_raises(SyntaxError) do
-      Template.parse('TEST {{ ')
+      Template.parse("TEST {{ ")
     end
   end
 
   def test_raise_on_label_and_no_close_bracets_percent
     assert_raises(SyntaxError) do
-      Template.parse('TEST {% ')
+      Template.parse("TEST {% ")
     end
   end
 
   def test_error_on_empty_filter
-    assert Template.parse('{{test}}')
+    assert Template.parse("{{test}}")
 
     with_error_mode(:lax) do
-      assert Template.parse('{{|test}}')
+      assert Template.parse("{{|test}}")
     end
 
     with_error_mode(:strict) do
-      assert_raises(SyntaxError) { Template.parse('{{|test}}') }
-      assert_raises(SyntaxError) { Template.parse('{{test |a|b|}}') }
+      assert_raises(SyntaxError) { Template.parse("{{|test}}") }
+      assert_raises(SyntaxError) { Template.parse("{{test |a|b|}}") }
     end
   end
 
@@ -53,20 +51,20 @@ class ParsingQuirksTest < Minitest::Test
   def test_unexpected_characters_syntax_error
     with_error_mode(:strict) do
       assert_raises(SyntaxError) do
-        markup = 'true && false'
+        markup = "true && false"
         Template.parse("{% if #{markup} %} YES {% endif %}")
       end
       assert_raises(SyntaxError) do
-        markup = 'false || true'
+        markup = "false || true"
         Template.parse("{% if #{markup} %} YES {% endif %}")
       end
     end
   end
 
   def test_no_error_on_lax_empty_filter
-    assert Template.parse('{{test |a|b|}}', error_mode: :lax)
-    assert Template.parse('{{test}}', error_mode: :lax)
-    assert Template.parse('{{|test|}}', error_mode: :lax)
+    assert Template.parse("{{test |a|b|}}", error_mode: :lax)
+    assert Template.parse("{{test}}", error_mode: :lax)
+    assert Template.parse("{{|test|}}", error_mode: :lax)
   end
 
   def test_meaningless_parens_lax
@@ -79,9 +77,9 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_unexpected_characters_silently_eat_logic_lax
     with_error_mode(:lax) do
-      markup = 'true && false'
+      markup = "true && false"
       assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}")
-      markup = 'false || true'
+      markup = "false || true"
       assert_template_result('', "{% if #{markup} %} YES {% endif %}")
     end
   end
@@ -114,7 +112,7 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_extra_dots_in_ranges
     with_error_mode(:lax) do
-      assert_template_result('12345', '{% for i in (1...5) %}{{ i }}{% endfor %}')
+      assert_template_result('12345', "{% for i in (1...5) %}{{ i }}{% endfor %}")
     end
   end
 

test/integration/render_profiling_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class RenderProfilingTest < Minitest::Test
@@ -74,7 +72,7 @@ class RenderProfilingTest < Minitest::Test
     t = Template.parse("{% include 'a_template' %}", profile: true)
     t.render!
 
-    assert t.profiler.total_render_time >= 0, 'Total render time was not calculated'
+    assert t.profiler.total_render_time >= 0, "Total render time was not calculated"
   end
 
   def test_profiling_uses_include_to_mark_children
@@ -91,7 +89,7 @@ class RenderProfilingTest < Minitest::Test
 
     include_node = t.profiler[1]
     include_node.children.each do |child|
-      assert_equal 'a_template', child.partial
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -101,12 +99,12 @@ class RenderProfilingTest < Minitest::Test
 
     a_template = t.profiler[1]
     a_template.children.each do |child|
-      assert_equal 'a_template', child.partial
+      assert_equal "a_template", child.partial
     end
 
     b_template = t.profiler[2]
     b_template.children.each do |child|
-      assert_equal 'b_template', child.partial
+      assert_equal "b_template", child.partial
     end
   end
 
@@ -116,12 +114,12 @@ class RenderProfilingTest < Minitest::Test
 
     a_template1 = t.profiler[1]
     a_template1.children.each do |child|
-      assert_equal 'a_template', child.partial
+      assert_equal "a_template", child.partial
     end
 
     a_template2 = t.profiler[2]
     a_template2.children.each do |child|
-      assert_equal 'a_template', child.partial
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -130,7 +128,7 @@ class RenderProfilingTest < Minitest::Test
     t.render!
 
     timing_count = 0
-    t.profiler.each do |_timing|
+    t.profiler.each do |timing|
       timing_count += 1
     end
 
@@ -138,7 +136,7 @@ class RenderProfilingTest < Minitest::Test
   end
 
   def test_profiling_marks_children_of_if_blocks
-    t = Template.parse('{% if true %} {% increment test %} {{ test }} {% endif %}', profile: true)
+    t = Template.parse("{% if true %} {% increment test %} {{ test }} {% endif %}", profile: true)
     t.render!
 
     assert_equal 1, t.profiler.length
@@ -146,8 +144,8 @@ class RenderProfilingTest < Minitest::Test
   end
 
   def test_profiling_marks_children_of_for_blocks
-    t = Template.parse('{% for item in collection %} {{ item }} {% endfor %}', profile: true)
-    t.render!('collection' => %w[one two])
+    t = Template.parse("{% for item in collection %} {{ item }} {% endfor %}", profile: true)
+    t.render!({ "collection" => ["one", "two"] })
 
     assert_equal 1, t.profiler.length
     # Will profile each invocation of the for block

test/integration/security_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 module SecurityFilter
@@ -59,22 +57,22 @@ class SecurityTest < Minitest::Test
     current_symbols = Symbol.all_symbols
 
     assigns = { 'drop' => Drop.new }
-    assert_equal '', Template.parse('{{ drop.custom_method_1 }}', assigns).render!
-    assert_equal '', Template.parse('{{ drop.custom_method_2 }}', assigns).render!
-    assert_equal '', Template.parse('{{ drop.custom_method_3 }}', assigns).render!
+    assert_equal "", Template.parse("{{ drop.custom_method_1 }}", assigns).render!
+    assert_equal "", Template.parse("{{ drop.custom_method_2 }}", assigns).render!
+    assert_equal "", Template.parse("{{ drop.custom_method_3 }}", assigns).render!
 
     assert_equal [], (Symbol.all_symbols - current_symbols)
   end
 
   def test_max_depth_nested_blocks_does_not_raise_exception
     depth = Liquid::Block::MAX_DEPTH
-    code = '{% if true %}' * depth + 'rendered' + '{% endif %}' * depth
-    assert_equal 'rendered', Template.parse(code).render!
+    code = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
+    assert_equal "rendered", Template.parse(code).render!
   end
 
   def test_more_than_max_depth_nested_blocks_raises_exception
     depth = Liquid::Block::MAX_DEPTH + 1
-    code = '{% if true %}' * depth + 'rendered' + '{% endif %}' * depth
+    code = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
     assert_raises(Liquid::StackLevelError) do
       Template.parse(code).render!
     end

test/integration/standard_filter_test.rb

@@ -1,4 +1,4 @@
-# frozen_string_literal: true
+# encoding: utf-8
 
 require 'test_helper'
 
@@ -17,7 +17,7 @@ class TestThing
     "woot: #{@foo}"
   end
 
-  def [](_whatever)
+  def [](whatever)
     to_s
   end
 
@@ -29,7 +29,7 @@ end
 
 class TestDrop < Liquid::Drop
   def test
-    'testfoo'
+    "testfoo"
   end
 end
 
@@ -37,7 +37,7 @@ class TestEnumerable < Liquid::Drop
   include Enumerable
 
   def each(&block)
-    [{ 'foo' => 1, 'bar' => 2 }, { 'foo' => 2, 'bar' => 1 }, { 'foo' => 3, 'bar' => 3 }].each(&block)
+    [ { "foo" => 1, "bar" => 2 }, { "foo" => 2, "bar" => 1 }, { "foo" => 3, "bar" => 3 } ].each(&block)
   end
 end
 
@@ -65,12 +65,12 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_downcase
-    assert_equal 'testing', @filters.downcase('Testing')
+    assert_equal 'testing', @filters.downcase("Testing")
     assert_equal '', @filters.downcase(nil)
   end
 
   def test_upcase
-    assert_equal 'TESTING', @filters.upcase('Testing')
+    assert_equal 'TESTING', @filters.upcase("Testing")
     assert_equal '', @filters.upcase(nil)
   end
 
@@ -91,22 +91,22 @@ class StandardFiltersTest < Minitest::Test
       @filters.slice('foobar', nil)
     end
     assert_raises(Liquid::ArgumentError) do
-      @filters.slice('foobar', 0, '')
+      @filters.slice('foobar', 0, "")
     end
   end
 
   def test_slice_on_arrays
     input = 'foobar'.split(//)
-    assert_equal %w[o o b], @filters.slice(input, 1, 3)
-    assert_equal %w[o o b a r], @filters.slice(input, 1, 1000)
-    assert_equal %w[], @filters.slice(input, 1, 0)
-    assert_equal %w[o], @filters.slice(input, 1, 1)
-    assert_equal %w[b a r], @filters.slice(input, 3, 3)
-    assert_equal %w[a r], @filters.slice(input, -2, 2)
-    assert_equal %w[a r], @filters.slice(input, -2, 1000)
-    assert_equal %w[r], @filters.slice(input, -1)
-    assert_equal %w[], @filters.slice(input, 100, 10)
-    assert_equal %w[], @filters.slice(input, -100, 10)
+    assert_equal %w(o o b), @filters.slice(input, 1, 3)
+    assert_equal %w(o o b a r), @filters.slice(input, 1, 1000)
+    assert_equal %w(), @filters.slice(input, 1, 0)
+    assert_equal %w(o), @filters.slice(input, 1, 1)
+    assert_equal %w(b a r), @filters.slice(input, 3, 3)
+    assert_equal %w(a r), @filters.slice(input, -2, 2)
+    assert_equal %w(a r), @filters.slice(input, -2, 1000)
+    assert_equal %w(r), @filters.slice(input, -1)
+    assert_equal %w(), @filters.slice(input, 100, 10)
+    assert_equal %w(), @filters.slice(input, -100, 10)
   end
 
   def test_truncate
@@ -114,16 +114,16 @@ class StandardFiltersTest < Minitest::Test
     assert_equal '1234567890', @filters.truncate('1234567890', 20)
     assert_equal '...', @filters.truncate('1234567890', 0)
     assert_equal '1234567890', @filters.truncate('1234567890')
-    assert_equal '测试...', @filters.truncate('测试测试测试测试', 5)
-    assert_equal '12341', @filters.truncate('1234567890', 5, 1)
+    assert_equal "测试...", @filters.truncate("测试测试测试测试", 5)
+    assert_equal '12341', @filters.truncate("1234567890", 5, 1)
   end
 
   def test_split
-    assert_equal %w[12 34], @filters.split('12~34', '~')
+    assert_equal ['12', '34'], @filters.split('12~34', '~')
     assert_equal ['A? ', ' ,Z'], @filters.split('A? ~ ~ ~ ,Z', '~ ~ ~')
     assert_equal ['A?Z'], @filters.split('A?Z', '~')
     assert_equal [], @filters.split(nil, ' ')
-    assert_equal %w[A Z], @filters.split('A1Z', 1)
+    assert_equal ['A', 'Z'], @filters.split('A1Z', 1)
   end
 
   def test_escape
@@ -169,12 +169,12 @@ class StandardFiltersTest < Minitest::Test
     assert_equal 'one two...', @filters.truncatewords('one two three', 2)
     assert_equal 'one two three', @filters.truncatewords('one two three')
     assert_equal 'Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221;...', @filters.truncatewords('Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221; x 16&#8221; x 10.5&#8221; high) with cover.', 15)
-    assert_equal '测试测试测试测试', @filters.truncatewords('测试测试测试测试', 5)
-    assert_equal 'one two1', @filters.truncatewords('one two three', 2, 1)
+    assert_equal "测试测试测试测试", @filters.truncatewords('测试测试测试测试', 5)
+    assert_equal 'one two1', @filters.truncatewords("one two three", 2, 1)
   end
 
   def test_strip_html
-    assert_equal 'test', @filters.strip_html('<div>test</div>')
+    assert_equal 'test', @filters.strip_html("<div>test</div>")
     assert_equal 'test', @filters.strip_html("<div id='test'>test</div>")
     assert_equal '', @filters.strip_html("<script type='text/javascript'>document.write('some stuff');</script>")
     assert_equal '', @filters.strip_html("<style type='text/css'>foo bar</style>")
@@ -183,7 +183,7 @@ class StandardFiltersTest < Minitest::Test
     assert_equal '', @filters.strip_html(nil)
 
     # Quirk of the existing implementation
-    assert_equal 'foo;', @filters.strip_html('<<<script </script>script>foo;</script>')
+    assert_equal 'foo;', @filters.strip_html("<<<script </script>script>foo;</script>")
   end
 
   def test_join
@@ -194,163 +194,163 @@ class StandardFiltersTest < Minitest::Test
 
   def test_sort
     assert_equal [1, 2, 3, 4], @filters.sort([4, 3, 2, 1])
-    assert_equal [{ 'a' => 1 }, { 'a' => 2 }, { 'a' => 3 }, { 'a' => 4 }], @filters.sort([{ 'a' => 4 }, { 'a' => 3 }, { 'a' => 1 }, { 'a' => 2 }], 'a')
+    assert_equal [{ "a" => 1 }, { "a" => 2 }, { "a" => 3 }, { "a" => 4 }], @filters.sort([{ "a" => 4 }, { "a" => 3 }, { "a" => 1 }, { "a" => 2 }], "a")
   end
 
   def test_sort_with_nils
     assert_equal [1, 2, 3, 4, nil], @filters.sort([nil, 4, 3, 2, 1])
-    assert_equal [{ 'a' => 1 }, { 'a' => 2 }, { 'a' => 3 }, { 'a' => 4 }, {}], @filters.sort([{ 'a' => 4 }, { 'a' => 3 }, {}, { 'a' => 1 }, { 'a' => 2 }], 'a')
+    assert_equal [{ "a" => 1 }, { "a" => 2 }, { "a" => 3 }, { "a" => 4 }, {}], @filters.sort([{ "a" => 4 }, { "a" => 3 }, {}, { "a" => 1 }, { "a" => 2 }], "a")
   end
 
   def test_sort_when_property_is_sometimes_missing_puts_nils_last
     input = [
-      { 'price' => 4, 'handle' => 'alpha' },
-      { 'handle' => 'beta' },
-      { 'price' => 1, 'handle' => 'gamma' },
-      { 'handle' => 'delta' },
-      { 'price' => 2, 'handle' => 'epsilon' },
+      { "price" => 4, "handle" => "alpha" },
+      { "handle" => "beta" },
+      { "price" => 1, "handle" => "gamma" },
+      { "handle" => "delta" },
+      { "price" => 2, "handle" => "epsilon" }
     ]
     expectation = [
-      { 'price' => 1, 'handle' => 'gamma' },
-      { 'price' => 2, 'handle' => 'epsilon' },
-      { 'price' => 4, 'handle' => 'alpha' },
-      { 'handle' => 'delta' },
-      { 'handle' => 'beta' },
+      { "price" => 1, "handle" => "gamma" },
+      { "price" => 2, "handle" => "epsilon" },
+      { "price" => 4, "handle" => "alpha" },
+      { "handle" => "delta" },
+      { "handle" => "beta" }
     ]
-    assert_equal expectation, @filters.sort(input, 'price')
+    assert_equal expectation, @filters.sort(input, "price")
   end
 
   def test_sort_natural
-    assert_equal %w[a B c D], @filters.sort_natural(%w[c D a B])
-    assert_equal [{ 'a' => 'a' }, { 'a' => 'B' }, { 'a' => 'c' }, { 'a' => 'D' }], @filters.sort_natural([{ 'a' => 'D' }, { 'a' => 'c' }, { 'a' => 'a' }, { 'a' => 'B' }], 'a')
+    assert_equal ["a", "B", "c", "D"], @filters.sort_natural(["c", "D", "a", "B"])
+    assert_equal [{ "a" => "a" }, { "a" => "B" }, { "a" => "c" }, { "a" => "D" }], @filters.sort_natural([{ "a" => "D" }, { "a" => "c" }, { "a" => "a" }, { "a" => "B" }], "a")
   end
 
   def test_sort_natural_with_nils
-    assert_equal ['a', 'B', 'c', 'D', nil], @filters.sort_natural([nil, 'c', 'D', 'a', 'B'])
-    assert_equal [{ 'a' => 'a' }, { 'a' => 'B' }, { 'a' => 'c' }, { 'a' => 'D' }, {}], @filters.sort_natural([{ 'a' => 'D' }, { 'a' => 'c' }, {}, { 'a' => 'a' }, { 'a' => 'B' }], 'a')
+    assert_equal ["a", "B", "c", "D", nil], @filters.sort_natural([nil, "c", "D", "a", "B"])
+    assert_equal [{ "a" => "a" }, { "a" => "B" }, { "a" => "c" }, { "a" => "D" }, {}], @filters.sort_natural([{ "a" => "D" }, { "a" => "c" }, {}, { "a" => "a" }, { "a" => "B" }], "a")
   end
 
   def test_sort_natural_when_property_is_sometimes_missing_puts_nils_last
     input = [
-      { 'price' => '4', 'handle' => 'alpha' },
-      { 'handle' => 'beta' },
-      { 'price' => '1', 'handle' => 'gamma' },
-      { 'handle' => 'delta' },
-      { 'price' => 2, 'handle' => 'epsilon' },
+      { "price" => "4", "handle" => "alpha" },
+      { "handle" => "beta" },
+      { "price" => "1", "handle" => "gamma" },
+      { "handle" => "delta" },
+      { "price" => 2, "handle" => "epsilon" }
     ]
     expectation = [
-      { 'price' => '1', 'handle' => 'gamma' },
-      { 'price' => 2, 'handle' => 'epsilon' },
-      { 'price' => '4', 'handle' => 'alpha' },
-      { 'handle' => 'delta' },
-      { 'handle' => 'beta' },
+      { "price" => "1", "handle" => "gamma" },
+      { "price" => 2, "handle" => "epsilon" },
+      { "price" => "4", "handle" => "alpha" },
+      { "handle" => "delta" },
+      { "handle" => "beta" }
     ]
-    assert_equal expectation, @filters.sort_natural(input, 'price')
+    assert_equal expectation, @filters.sort_natural(input, "price")
   end
 
   def test_sort_natural_case_check
     input = [
-      { 'key' => 'X' },
-      { 'key' => 'Y' },
-      { 'key' => 'Z' },
-      { 'fake' => 't' },
-      { 'key' => 'a' },
-      { 'key' => 'b' },
-      { 'key' => 'c' },
+      { "key" => "X" },
+      { "key" => "Y" },
+      { "key" => "Z" },
+      { "fake" => "t" },
+      { "key" => "a" },
+      { "key" => "b" },
+      { "key" => "c" }
     ]
     expectation = [
-      { 'key' => 'a' },
-      { 'key' => 'b' },
-      { 'key' => 'c' },
-      { 'key' => 'X' },
-      { 'key' => 'Y' },
-      { 'key' => 'Z' },
-      { 'fake' => 't' },
+      { "key" => "a" },
+      { "key" => "b" },
+      { "key" => "c" },
+      { "key" => "X" },
+      { "key" => "Y" },
+      { "key" => "Z" },
+      { "fake" => "t" }
     ]
-    assert_equal expectation, @filters.sort_natural(input, 'key')
-    assert_equal %w[a b c X Y Z], @filters.sort_natural(%w[X Y Z a b c])
+    assert_equal expectation, @filters.sort_natural(input, "key")
+    assert_equal ["a", "b", "c", "X", "Y", "Z"], @filters.sort_natural(["X", "Y", "Z", "a", "b", "c"])
   end
 
   def test_sort_empty_array
-    assert_equal [], @filters.sort([], 'a')
+    assert_equal [], @filters.sort([], "a")
   end
 
   def test_sort_invalid_property
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
 
     assert_raises Liquid::ArgumentError do
-      @filters.sort(foo, 'bar')
+      @filters.sort(foo, "bar")
     end
   end
 
   def test_sort_natural_empty_array
-    assert_equal [], @filters.sort_natural([], 'a')
+    assert_equal [], @filters.sort_natural([], "a")
   end
 
   def test_sort_natural_invalid_property
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
 
     assert_raises Liquid::ArgumentError do
-      @filters.sort_natural(foo, 'bar')
+      @filters.sort_natural(foo, "bar")
     end
   end
 
   def test_legacy_sort_hash
-    assert_equal [{ a: 1, b: 2 }], @filters.sort(a: 1, b: 2)
+    assert_equal [{ a: 1, b: 2 }], @filters.sort({ a: 1, b: 2 })
   end
 
   def test_numerical_vs_lexicographical_sort
     assert_equal [2, 10], @filters.sort([10, 2])
-    assert_equal [{ 'a' => 2 }, { 'a' => 10 }], @filters.sort([{ 'a' => 10 }, { 'a' => 2 }], 'a')
-    assert_equal %w[10 2], @filters.sort(%w[10 2])
-    assert_equal [{ 'a' => '10' }, { 'a' => '2' }], @filters.sort([{ 'a' => '10' }, { 'a' => '2' }], 'a')
+    assert_equal [{ "a" => 2 }, { "a" => 10 }], @filters.sort([{ "a" => 10 }, { "a" => 2 }], "a")
+    assert_equal ["10", "2"], @filters.sort(["10", "2"])
+    assert_equal [{ "a" => "10" }, { "a" => "2" }], @filters.sort([{ "a" => "10" }, { "a" => "2" }], "a")
   end
 
   def test_uniq
-    assert_equal ['foo'], @filters.uniq('foo')
+    assert_equal ["foo"], @filters.uniq("foo")
     assert_equal [1, 3, 2, 4], @filters.uniq([1, 1, 3, 2, 3, 1, 4, 3, 2, 1])
-    assert_equal [{ 'a' => 1 }, { 'a' => 3 }, { 'a' => 2 }], @filters.uniq([{ 'a' => 1 }, { 'a' => 3 }, { 'a' => 1 }, { 'a' => 2 }], 'a')
+    assert_equal [{ "a" => 1 }, { "a" => 3 }, { "a" => 2 }], @filters.uniq([{ "a" => 1 }, { "a" => 3 }, { "a" => 1 }, { "a" => 2 }], "a")
     testdrop = TestDrop.new
     assert_equal [testdrop], @filters.uniq([testdrop, TestDrop.new], 'test')
   end
 
   def test_uniq_empty_array
-    assert_equal [], @filters.uniq([], 'a')
+    assert_equal [], @filters.uniq([], "a")
   end
 
   def test_uniq_invalid_property
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
 
     assert_raises Liquid::ArgumentError do
-      @filters.uniq(foo, 'bar')
+      @filters.uniq(foo, "bar")
     end
   end
 
   def test_compact_empty_array
-    assert_equal [], @filters.compact([], 'a')
+    assert_equal [], @filters.compact([], "a")
   end
 
   def test_compact_invalid_property
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
 
     assert_raises Liquid::ArgumentError do
-      @filters.compact(foo, 'bar')
+      @filters.compact(foo, "bar")
     end
   end
 
@@ -363,71 +363,71 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_map
-    assert_equal [1, 2, 3, 4], @filters.map([{ 'a' => 1 }, { 'a' => 2 }, { 'a' => 3 }, { 'a' => 4 }], 'a')
+    assert_equal [1, 2, 3, 4], @filters.map([{ "a" => 1 }, { "a" => 2 }, { "a" => 3 }, { "a" => 4 }], 'a')
     assert_template_result 'abc', "{{ ary | map:'foo' | map:'bar' }}",
-                           'ary' => [{ 'foo' => { 'bar' => 'a' } }, { 'foo' => { 'bar' => 'b' } }, { 'foo' => { 'bar' => 'c' } }]
+      'ary' => [{ 'foo' => { 'bar' => 'a' } }, { 'foo' => { 'bar' => 'b' } }, { 'foo' => { 'bar' => 'c' } }]
   end
 
   def test_map_doesnt_call_arbitrary_stuff
-    assert_template_result '', '{{ "foo" | map: "__id__" }}'
-    assert_template_result '', '{{ "foo" | map: "inspect" }}'
+    assert_template_result "", '{{ "foo" | map: "__id__" }}'
+    assert_template_result "", '{{ "foo" | map: "inspect" }}'
   end
 
   def test_map_calls_to_liquid
     t = TestThing.new
-    assert_template_result 'woot: 1', '{{ foo | map: "whatever" }}', 'foo' => [t]
+    assert_template_result "woot: 1", '{{ foo | map: "whatever" }}', "foo" => [t]
   end
 
   def test_map_on_hashes
-    assert_template_result '4217', '{{ thing | map: "foo" | map: "bar" }}',
-                           'thing' => { 'foo' => [{ 'bar' => 42 }, { 'bar' => 17 }] }
+    assert_template_result "4217", '{{ thing | map: "foo" | map: "bar" }}',
+      "thing" => { "foo" => [ { "bar" => 42 }, { "bar" => 17 } ] }
   end
 
   def test_legacy_map_on_hashes_with_dynamic_key
     template = "{% assign key = 'foo' %}{{ thing | map: key | map: 'bar' }}"
-    hash = { 'foo' => { 'bar' => 42 } }
-    assert_template_result '42', template, 'thing' => hash
+    hash = { "foo" => { "bar" => 42 } }
+    assert_template_result "42", template, "thing" => hash
   end
 
   def test_sort_calls_to_liquid
     t = TestThing.new
-    Liquid::Template.parse('{{ foo | sort: "whatever" }}').render('foo' => [t])
-    assert t.foo.positive?
+    Liquid::Template.parse('{{ foo | sort: "whatever" }}').render("foo" => [t])
+    assert t.foo > 0
   end
 
   def test_map_over_proc
     drop = TestDrop.new
-    p = proc { drop }
+    p = proc{ drop }
     templ = '{{ procs | map: "test" }}'
-    assert_template_result 'testfoo', templ, 'procs' => [p]
+    assert_template_result "testfoo", templ, "procs" => [p]
   end
 
   def test_map_over_drops_returning_procs
     drops = [
       {
-        'proc' => -> { 'foo' },
+        "proc" => ->{ "foo" },
       },
       {
-        'proc' => -> { 'bar' },
+        "proc" => ->{ "bar" },
       },
     ]
     templ = '{{ drops | map: "proc" }}'
-    assert_template_result 'foobar', templ, 'drops' => drops
+    assert_template_result "foobar", templ, "drops" => drops
   end
 
   def test_map_works_on_enumerables
-    assert_template_result '123', '{{ foo | map: "foo" }}', 'foo' => TestEnumerable.new
+    assert_template_result "123", '{{ foo | map: "foo" }}', "foo" => TestEnumerable.new
   end
 
   def test_map_returns_empty_on_2d_input_array
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
 
     assert_raises Liquid::ArgumentError do
-      @filters.map(foo, 'bar')
+      @filters.map(foo, "bar")
     end
   end
 
@@ -435,7 +435,7 @@ class StandardFiltersTest < Minitest::Test
     foo = [
       [1],
       [2],
-      [3],
+      [3]
     ]
     assert_raises Liquid::ArgumentError do
       @filters.map(foo, nil)
@@ -443,7 +443,7 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_sort_works_on_enumerables
-    assert_template_result '213', '{{ foo | sort: "bar" | map: "foo" }}', 'foo' => TestEnumerable.new
+    assert_template_result "213", '{{ foo | sort: "bar" | map: "foo" }}', "foo" => TestEnumerable.new
   end
 
   def test_first_and_last_call_to_liquid
@@ -452,37 +452,37 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_truncate_calls_to_liquid
-    assert_template_result 'wo...', '{{ foo | truncate: 5 }}', 'foo' => TestThing.new
+    assert_template_result "wo...", '{{ foo | truncate: 5 }}', "foo" => TestThing.new
   end
 
   def test_date
-    assert_equal 'May', @filters.date(Time.parse('2006-05-05 10:00:00'), '%B')
-    assert_equal 'June', @filters.date(Time.parse('2006-06-05 10:00:00'), '%B')
-    assert_equal 'July', @filters.date(Time.parse('2006-07-05 10:00:00'), '%B')
+    assert_equal 'May', @filters.date(Time.parse("2006-05-05 10:00:00"), "%B")
+    assert_equal 'June', @filters.date(Time.parse("2006-06-05 10:00:00"), "%B")
+    assert_equal 'July', @filters.date(Time.parse("2006-07-05 10:00:00"), "%B")
 
-    assert_equal 'May', @filters.date('2006-05-05 10:00:00', '%B')
-    assert_equal 'June', @filters.date('2006-06-05 10:00:00', '%B')
-    assert_equal 'July', @filters.date('2006-07-05 10:00:00', '%B')
+    assert_equal 'May', @filters.date("2006-05-05 10:00:00", "%B")
+    assert_equal 'June', @filters.date("2006-06-05 10:00:00", "%B")
+    assert_equal 'July', @filters.date("2006-07-05 10:00:00", "%B")
 
-    assert_equal '2006-07-05 10:00:00', @filters.date('2006-07-05 10:00:00', '')
-    assert_equal '2006-07-05 10:00:00', @filters.date('2006-07-05 10:00:00', '')
-    assert_equal '2006-07-05 10:00:00', @filters.date('2006-07-05 10:00:00', '')
-    assert_equal '2006-07-05 10:00:00', @filters.date('2006-07-05 10:00:00', nil)
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", "")
+    assert_equal '2006-07-05 10:00:00', @filters.date("2006-07-05 10:00:00", nil)
 
-    assert_equal '07/05/2006', @filters.date('2006-07-05 10:00:00', '%m/%d/%Y')
+    assert_equal '07/05/2006', @filters.date("2006-07-05 10:00:00", "%m/%d/%Y")
 
-    assert_equal '07/16/2004', @filters.date('Fri Jul 16 01:00:00 2004', '%m/%d/%Y')
+    assert_equal "07/16/2004", @filters.date("Fri Jul 16 01:00:00 2004", "%m/%d/%Y")
     assert_equal Date.today.year.to_s, @filters.date('now', '%Y')
     assert_equal Date.today.year.to_s, @filters.date('today', '%Y')
     assert_equal Date.today.year.to_s, @filters.date('Today', '%Y')
 
-    assert_nil @filters.date(nil, '%B')
+    assert_nil @filters.date(nil, "%B")
 
-    assert_equal '', @filters.date('', '%B')
+    assert_equal '', @filters.date('', "%B")
 
-    with_timezone('UTC') do
-      assert_equal '07/05/2006', @filters.date(1_152_098_955, '%m/%d/%Y')
-      assert_equal '07/05/2006', @filters.date('1152098955', '%m/%d/%Y')
+    with_timezone("UTC") do
+      assert_equal "07/05/2006", @filters.date(1152098955, "%m/%d/%Y")
+      assert_equal "07/05/2006", @filters.date("1152098955", "%m/%d/%Y")
     end
   end
 
@@ -502,10 +502,10 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_remove
-    assert_equal '   ', @filters.remove('a a a a', 'a')
-    assert_equal '   ', @filters.remove('1 1 1 1', 1)
-    assert_equal 'a a a', @filters.remove_first('a a a a', 'a ')
-    assert_equal ' 1 1 1', @filters.remove_first('1 1 1 1', 1)
+    assert_equal '   ', @filters.remove("a a a a", 'a')
+    assert_equal '   ', @filters.remove("1 1 1 1", 1)
+    assert_equal 'a a a', @filters.remove_first("a a a a", 'a ')
+    assert_equal ' 1 1 1', @filters.remove_first("1 1 1 1", 1)
     assert_template_result 'a a a', "{{ 'a a a a' | remove_first: 'a ' }}"
   end
 
@@ -514,148 +514,148 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_strip
-    assert_template_result 'ab c', '{{ source | strip }}', 'source' => ' ab c  '
-    assert_template_result 'ab c', '{{ source | strip }}', 'source' => " \tab c  \n \t"
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " ab c  "
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " \tab c  \n \t"
   end
 
   def test_lstrip
-    assert_template_result 'ab c  ', '{{ source | lstrip }}', 'source' => ' ab c  '
-    assert_template_result "ab c  \n \t", '{{ source | lstrip }}', 'source' => " \tab c  \n \t"
+    assert_template_result 'ab c  ', "{{ source | lstrip }}", 'source' => " ab c  "
+    assert_template_result "ab c  \n \t", "{{ source | lstrip }}", 'source' => " \tab c  \n \t"
   end
 
   def test_rstrip
-    assert_template_result ' ab c', '{{ source | rstrip }}', 'source' => ' ab c  '
-    assert_template_result " \tab c", '{{ source | rstrip }}', 'source' => " \tab c  \n \t"
+    assert_template_result " ab c", "{{ source | rstrip }}", 'source' => " ab c  "
+    assert_template_result " \tab c", "{{ source | rstrip }}", 'source' => " \tab c  \n \t"
   end
 
   def test_strip_newlines
-    assert_template_result 'abc', '{{ source | strip_newlines }}', 'source' => "a\nb\nc"
-    assert_template_result 'abc', '{{ source | strip_newlines }}', 'source' => "a\r\nb\nc"
+    assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\nb\nc"
+    assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\r\nb\nc"
   end
 
   def test_newlines_to_br
-    assert_template_result "a<br />\nb<br />\nc", '{{ source | newline_to_br }}', 'source' => "a\nb\nc"
+    assert_template_result "a<br />\nb<br />\nc", "{{ source | newline_to_br }}", 'source' => "a\nb\nc"
   end
 
   def test_plus
-    assert_template_result '2', '{{ 1 | plus:1 }}'
-    assert_template_result '2.0', "{{ '1' | plus:'1.0' }}"
+    assert_template_result "2", "{{ 1 | plus:1 }}"
+    assert_template_result "2.0", "{{ '1' | plus:'1.0' }}"
 
-    assert_template_result '5', "{{ price | plus:'2' }}", 'price' => NumberLikeThing.new(3)
+    assert_template_result "5", "{{ price | plus:'2' }}", 'price' => NumberLikeThing.new(3)
   end
 
   def test_minus
-    assert_template_result '4', '{{ input | minus:operand }}', 'input' => 5, 'operand' => 1
-    assert_template_result '2.3', "{{ '4.3' | minus:'2' }}"
+    assert_template_result "4", "{{ input | minus:operand }}", 'input' => 5, 'operand' => 1
+    assert_template_result "2.3", "{{ '4.3' | minus:'2' }}"
 
-    assert_template_result '5', "{{ price | minus:'2' }}", 'price' => NumberLikeThing.new(7)
+    assert_template_result "5", "{{ price | minus:'2' }}", 'price' => NumberLikeThing.new(7)
   end
 
   def test_abs
-    assert_template_result '17', '{{ 17 | abs }}'
-    assert_template_result '17', '{{ -17 | abs }}'
-    assert_template_result '17', "{{ '17' | abs }}"
-    assert_template_result '17', "{{ '-17' | abs }}"
-    assert_template_result '0', '{{ 0 | abs }}'
-    assert_template_result '0', "{{ '0' | abs }}"
-    assert_template_result '17.42', '{{ 17.42 | abs }}'
-    assert_template_result '17.42', '{{ -17.42 | abs }}'
-    assert_template_result '17.42', "{{ '17.42' | abs }}"
-    assert_template_result '17.42', "{{ '-17.42' | abs }}"
+    assert_template_result "17", "{{ 17 | abs }}"
+    assert_template_result "17", "{{ -17 | abs }}"
+    assert_template_result "17", "{{ '17' | abs }}"
+    assert_template_result "17", "{{ '-17' | abs }}"
+    assert_template_result "0", "{{ 0 | abs }}"
+    assert_template_result "0", "{{ '0' | abs }}"
+    assert_template_result "17.42", "{{ 17.42 | abs }}"
+    assert_template_result "17.42", "{{ -17.42 | abs }}"
+    assert_template_result "17.42", "{{ '17.42' | abs }}"
+    assert_template_result "17.42", "{{ '-17.42' | abs }}"
   end
 
   def test_times
-    assert_template_result '12', '{{ 3 | times:4 }}'
-    assert_template_result '0', "{{ 'foo' | times:4 }}"
-    assert_template_result '6', "{{ '2.1' | times:3 | replace: '.','-' | plus:0}}"
-    assert_template_result '7.25', '{{ 0.0725 | times:100 }}'
-    assert_template_result '-7.25', '{{ "-0.0725" | times:100 }}'
-    assert_template_result '7.25', '{{ "-0.0725" | times: -100 }}'
-    assert_template_result '4', '{{ price | times:2 }}', 'price' => NumberLikeThing.new(2)
+    assert_template_result "12", "{{ 3 | times:4 }}"
+    assert_template_result "0", "{{ 'foo' | times:4 }}"
+    assert_template_result "6", "{{ '2.1' | times:3 | replace: '.','-' | plus:0}}"
+    assert_template_result "7.25", "{{ 0.0725 | times:100 }}"
+    assert_template_result "-7.25", '{{ "-0.0725" | times:100 }}'
+    assert_template_result "7.25", '{{ "-0.0725" | times: -100 }}'
+    assert_template_result "4", "{{ price | times:2 }}", 'price' => NumberLikeThing.new(2)
   end
 
   def test_divided_by
-    assert_template_result '4', '{{ 12 | divided_by:3 }}'
-    assert_template_result '4', '{{ 14 | divided_by:3 }}'
+    assert_template_result "4", "{{ 12 | divided_by:3 }}"
+    assert_template_result "4", "{{ 14 | divided_by:3 }}"
 
-    assert_template_result '5', '{{ 15 | divided_by:3 }}'
-    assert_equal 'Liquid error: divided by 0', Template.parse('{{ 5 | divided_by:0 }}').render
+    assert_template_result "5", "{{ 15 | divided_by:3 }}"
+    assert_equal "Liquid error: divided by 0", Template.parse("{{ 5 | divided_by:0 }}").render
 
-    assert_template_result '0.5', '{{ 2.0 | divided_by:4 }}'
+    assert_template_result "0.5", "{{ 2.0 | divided_by:4 }}"
     assert_raises(Liquid::ZeroDivisionError) do
-      assert_template_result '4', '{{ 1 | modulo: 0 }}'
+      assert_template_result "4", "{{ 1 | modulo: 0 }}"
     end
 
-    assert_template_result '5', '{{ price | divided_by:2 }}', 'price' => NumberLikeThing.new(10)
+    assert_template_result "5", "{{ price | divided_by:2 }}", 'price' => NumberLikeThing.new(10)
   end
 
   def test_modulo
-    assert_template_result '1', '{{ 3 | modulo:2 }}'
+    assert_template_result "1", "{{ 3 | modulo:2 }}"
     assert_raises(Liquid::ZeroDivisionError) do
-      assert_template_result '4', '{{ 1 | modulo: 0 }}'
+      assert_template_result "4", "{{ 1 | modulo: 0 }}"
     end
 
-    assert_template_result '1', '{{ price | modulo:2 }}', 'price' => NumberLikeThing.new(3)
+    assert_template_result "1", "{{ price | modulo:2 }}", 'price' => NumberLikeThing.new(3)
   end
 
   def test_round
-    assert_template_result '5', '{{ input | round }}', 'input' => 4.6
-    assert_template_result '4', "{{ '4.3' | round }}"
-    assert_template_result '4.56', '{{ input | round: 2 }}', 'input' => 4.5612
+    assert_template_result "5", "{{ input | round }}", 'input' => 4.6
+    assert_template_result "4", "{{ '4.3' | round }}"
+    assert_template_result "4.56", "{{ input | round: 2 }}", 'input' => 4.5612
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result '4', '{{ 1.0 | divided_by: 0.0 | round }}'
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | round }}"
     end
 
-    assert_template_result '5', '{{ price | round }}', 'price' => NumberLikeThing.new(4.6)
-    assert_template_result '4', '{{ price | round }}', 'price' => NumberLikeThing.new(4.3)
+    assert_template_result "5", "{{ price | round }}", 'price' => NumberLikeThing.new(4.6)
+    assert_template_result "4", "{{ price | round }}", 'price' => NumberLikeThing.new(4.3)
   end
 
   def test_ceil
-    assert_template_result '5', '{{ input | ceil }}', 'input' => 4.6
-    assert_template_result '5', "{{ '4.3' | ceil }}"
+    assert_template_result "5", "{{ input | ceil }}", 'input' => 4.6
+    assert_template_result "5", "{{ '4.3' | ceil }}"
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result '4', '{{ 1.0 | divided_by: 0.0 | ceil }}'
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | ceil }}"
     end
 
-    assert_template_result '5', '{{ price | ceil }}', 'price' => NumberLikeThing.new(4.6)
+    assert_template_result "5", "{{ price | ceil }}", 'price' => NumberLikeThing.new(4.6)
   end
 
   def test_floor
-    assert_template_result '4', '{{ input | floor }}', 'input' => 4.6
-    assert_template_result '4', "{{ '4.3' | floor }}"
+    assert_template_result "4", "{{ input | floor }}", 'input' => 4.6
+    assert_template_result "4", "{{ '4.3' | floor }}"
     assert_raises(Liquid::FloatDomainError) do
-      assert_template_result '4', '{{ 1.0 | divided_by: 0.0 | floor }}'
+      assert_template_result "4", "{{ 1.0 | divided_by: 0.0 | floor }}"
     end
 
-    assert_template_result '5', '{{ price | floor }}', 'price' => NumberLikeThing.new(5.4)
+    assert_template_result "5", "{{ price | floor }}", 'price' => NumberLikeThing.new(5.4)
   end
 
   def test_at_most
-    assert_template_result '4', '{{ 5 | at_most:4 }}'
-    assert_template_result '5', '{{ 5 | at_most:5 }}'
-    assert_template_result '5', '{{ 5 | at_most:6 }}'
+    assert_template_result "4", "{{ 5 | at_most:4 }}"
+    assert_template_result "5", "{{ 5 | at_most:5 }}"
+    assert_template_result "5", "{{ 5 | at_most:6 }}"
 
-    assert_template_result '4.5', '{{ 4.5 | at_most:5 }}'
-    assert_template_result '5', '{{ width | at_most:5 }}', 'width' => NumberLikeThing.new(6)
-    assert_template_result '4', '{{ width | at_most:5 }}', 'width' => NumberLikeThing.new(4)
-    assert_template_result '4', '{{ 5 | at_most: width }}', 'width' => NumberLikeThing.new(4)
+    assert_template_result "4.5", "{{ 4.5 | at_most:5 }}"
+    assert_template_result "5", "{{ width | at_most:5 }}", 'width' => NumberLikeThing.new(6)
+    assert_template_result "4", "{{ width | at_most:5 }}", 'width' => NumberLikeThing.new(4)
+    assert_template_result "4", "{{ 5 | at_most: width }}", 'width' => NumberLikeThing.new(4)
   end
 
   def test_at_least
-    assert_template_result '5', '{{ 5 | at_least:4 }}'
-    assert_template_result '5', '{{ 5 | at_least:5 }}'
-    assert_template_result '6', '{{ 5 | at_least:6 }}'
+    assert_template_result "5", "{{ 5 | at_least:4 }}"
+    assert_template_result "5", "{{ 5 | at_least:5 }}"
+    assert_template_result "6", "{{ 5 | at_least:6 }}"
 
-    assert_template_result '5', '{{ 4.5 | at_least:5 }}'
-    assert_template_result '6', '{{ width | at_least:5 }}', 'width' => NumberLikeThing.new(6)
-    assert_template_result '5', '{{ width | at_least:5 }}', 'width' => NumberLikeThing.new(4)
-    assert_template_result '6', '{{ 5 | at_least: width }}', 'width' => NumberLikeThing.new(6)
+    assert_template_result "5", "{{ 4.5 | at_least:5 }}"
+    assert_template_result "6", "{{ width | at_least:5 }}", 'width' => NumberLikeThing.new(6)
+    assert_template_result "5", "{{ width | at_least:5 }}", 'width' => NumberLikeThing.new(4)
+    assert_template_result "6", "{{ 5 | at_least: width }}", 'width' => NumberLikeThing.new(6)
   end
 
   def test_append
     assigns = { 'a' => 'bc', 'b' => 'd' }
     assert_template_result('bcd', "{{ a | append: 'd'}}", assigns)
-    assert_template_result('bcd', '{{ a | append: b}}', assigns)
+    assert_template_result('bcd', "{{ a | append: b}}", assigns)
   end
 
   def test_concat
@@ -663,7 +663,7 @@ class StandardFiltersTest < Minitest::Test
     assert_equal [1, 2, 'a'],  @filters.concat([1, 2], ['a'])
     assert_equal [1, 2, 10],   @filters.concat([1, 2], [10])
 
-    assert_raises(Liquid::ArgumentError, 'concat filter requires an array argument') do
+    assert_raises(Liquid::ArgumentError, "concat filter requires an array argument") do
       @filters.concat([1, 2], 10)
     end
   end
@@ -671,16 +671,16 @@ class StandardFiltersTest < Minitest::Test
   def test_prepend
     assigns = { 'a' => 'bc', 'b' => 'a' }
     assert_template_result('abc', "{{ a | prepend: 'a'}}", assigns)
-    assert_template_result('abc', '{{ a | prepend: b}}', assigns)
+    assert_template_result('abc', "{{ a | prepend: b}}", assigns)
   end
 
   def test_default
-    assert_equal 'foo', @filters.default('foo', 'bar')
-    assert_equal 'bar', @filters.default(nil, 'bar')
-    assert_equal 'bar', @filters.default('', 'bar')
-    assert_equal 'bar', @filters.default(false, 'bar')
-    assert_equal 'bar', @filters.default([], 'bar')
-    assert_equal 'bar', @filters.default({}, 'bar')
+    assert_equal "foo", @filters.default("foo", "bar")
+    assert_equal "bar", @filters.default(nil, "bar")
+    assert_equal "bar", @filters.default("", "bar")
+    assert_equal "bar", @filters.default(false, "bar")
+    assert_equal "bar", @filters.default([], "bar")
+    assert_equal "bar", @filters.default({}, "bar")
   end
 
   def test_cannot_access_private_methods
@@ -694,74 +694,74 @@ class StandardFiltersTest < Minitest::Test
 
   def test_where
     input = [
-      { 'handle' => 'alpha', 'ok' => true },
-      { 'handle' => 'beta', 'ok' => false },
-      { 'handle' => 'gamma', 'ok' => false },
-      { 'handle' => 'delta', 'ok' => true },
+      { "handle" => "alpha", "ok" => true },
+      { "handle" => "beta", "ok" => false },
+      { "handle" => "gamma", "ok" => false },
+      { "handle" => "delta", "ok" => true }
     ]
 
     expectation = [
-      { 'handle' => 'alpha', 'ok' => true },
-      { 'handle' => 'delta', 'ok' => true },
+      { "handle" => "alpha", "ok" => true },
+      { "handle" => "delta", "ok" => true }
     ]
 
-    assert_equal expectation, @filters.where(input, 'ok', true)
-    assert_equal expectation, @filters.where(input, 'ok')
+    assert_equal expectation, @filters.where(input, "ok", true)
+    assert_equal expectation, @filters.where(input, "ok")
   end
 
   def test_where_no_key_set
     input = [
-      { 'handle' => 'alpha', 'ok' => true },
-      { 'handle' => 'beta' },
-      { 'handle' => 'gamma' },
-      { 'handle' => 'delta', 'ok' => true },
+      { "handle" => "alpha", "ok" => true },
+      { "handle" => "beta" },
+      { "handle" => "gamma" },
+      { "handle" => "delta", "ok" => true }
     ]
 
     expectation = [
-      { 'handle' => 'alpha', 'ok' => true },
-      { 'handle' => 'delta', 'ok' => true },
+      { "handle" => "alpha", "ok" => true },
+      { "handle" => "delta", "ok" => true }
     ]
 
-    assert_equal expectation, @filters.where(input, 'ok', true)
-    assert_equal expectation, @filters.where(input, 'ok')
+    assert_equal expectation, @filters.where(input, "ok", true)
+    assert_equal expectation, @filters.where(input, "ok")
   end
 
   def test_where_non_array_map_input
-    assert_equal [{ 'a' => 'ok' }], @filters.where({ 'a' => 'ok' }, 'a', 'ok')
-    assert_equal [], @filters.where({ 'a' => 'not ok' }, 'a', 'ok')
+    assert_equal [{ "a" => "ok" }], @filters.where({ "a" => "ok" }, "a", "ok")
+    assert_equal [], @filters.where({ "a" => "not ok" }, "a", "ok")
   end
 
   def test_where_indexable_but_non_map_value
-    assert_raises(Liquid::ArgumentError) { @filters.where(1, 'ok', true) }
-    assert_raises(Liquid::ArgumentError) { @filters.where(1, 'ok') }
+    assert_raises(Liquid::ArgumentError) { @filters.where(1, "ok", true) }
+    assert_raises(Liquid::ArgumentError) { @filters.where(1, "ok") }
   end
 
   def test_where_non_boolean_value
     input = [
-      { 'message' => 'Bonjour!', 'language' => 'French' },
-      { 'message' => 'Hello!', 'language' => 'English' },
-      { 'message' => 'Hallo!', 'language' => 'German' },
+      { "message" => "Bonjour!", "language" => "French" },
+      { "message" => "Hello!", "language" => "English" },
+      { "message" => "Hallo!", "language" => "German" }
     ]
 
-    assert_equal [{ 'message' => 'Bonjour!', 'language' => 'French' }], @filters.where(input, 'language', 'French')
-    assert_equal [{ 'message' => 'Hallo!', 'language' => 'German' }], @filters.where(input, 'language', 'German')
-    assert_equal [{ 'message' => 'Hello!', 'language' => 'English' }], @filters.where(input, 'language', 'English')
+    assert_equal [{ "message" => "Bonjour!", "language" => "French" }], @filters.where(input, "language", "French")
+    assert_equal [{ "message" => "Hallo!", "language" => "German" }], @filters.where(input, "language", "German")
+    assert_equal [{ "message" => "Hello!", "language" => "English" }], @filters.where(input, "language", "English")
   end
 
   def test_where_array_of_only_unindexable_values
-    assert_nil @filters.where([nil], 'ok', true)
-    assert_nil @filters.where([nil], 'ok')
+    assert_nil @filters.where([nil], "ok", true)
+    assert_nil @filters.where([nil], "ok")
   end
 
   def test_where_no_target_value
     input = [
-      { 'foo' => false },
-      { 'foo' => true },
-      { 'foo' => 'for sure' },
-      { 'bar' => true },
+      { "foo" => false },
+      { "foo" => true },
+      { "foo" => "for sure" },
+      { "bar" => true }
     ]
 
-    assert_equal [{ 'foo' => true }, { 'foo' => 'for sure' }], @filters.where(input, 'foo')
+    assert_equal [{ "foo" => true }, { "foo" => "for sure" }], @filters.where(input, "foo")
   end
 
   private

test/integration/tags/break_tag_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class BreakTagTest < Minitest::Test

test/integration/tags/continue_tag_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ContinueTagTest < Minitest::Test

test/integration/tags/echo_test.rb

@@ -0,0 +1,11 @@
+require 'test_helper'
+
+class EchoTest < Minitest::Test
+  include Liquid
+
+  def test_echo_outputs_its_input
+    assert_template_result('BAR', <<~LIQUID, { 'variable-name' => 'bar' })
+      {%- echo variable-name | upcase -%}
+    LIQUID
+  end
+end

test/integration/tags/for_tag_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class ThingWithValue < Liquid::Drop
@@ -25,16 +23,16 @@ class ForTagTest < Minitest::Test
   yo
 
 HERE
-    template = <<~HERE
-      {%for item in array%}
-        yo
-      {%endfor%}
-    HERE
+    template = <<HERE
+{%for item in array%}
+  yo
+{%endfor%}
+HERE
     assert_template_result(expected, template, 'array' => [1, 2, 3])
   end
 
   def test_for_reversed
-    assigns = { 'array' => [1, 2, 3] }
+    assigns = { 'array' => [ 1, 2, 3] }
     assert_template_result('321', '{%for item in array reversed %}{{item}}{%endfor%}', assigns)
   end
 
@@ -42,31 +40,31 @@ HERE
     assert_template_result(' 1  2  3 ', '{%for item in (1..3) %} {{item}} {%endfor%}')
 
     assert_raises(Liquid::ArgumentError) do
-      Template.parse('{% for i in (a..2) %}{% endfor %}').render!('a' => [1, 2])
+      Template.parse('{% for i in (a..2) %}{% endfor %}').render!("a" => [1, 2])
     end
 
-    assert_template_result(' 0  1  2  3 ', '{% for item in (a..3) %} {{item}} {% endfor %}', 'a' => 'invalid integer')
+    assert_template_result(' 0  1  2  3 ', '{% for item in (a..3) %} {{item}} {% endfor %}', "a" => "invalid integer")
   end
 
   def test_for_with_variable_range
-    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar) %} {{item}} {%endfor%}', 'foobar' => 3)
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar) %} {{item}} {%endfor%}', "foobar" => 3)
   end
 
   def test_for_with_hash_value_range
-    foobar = { 'value' => 3 }
-    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', 'foobar' => foobar)
+    foobar = { "value" => 3 }
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
   end
 
   def test_for_with_drop_value_range
     foobar = ThingWithValue.new
-    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', 'foobar' => foobar)
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
   end
 
   def test_for_with_variable
     assert_template_result(' 1  2  3 ', '{%for item in array%} {{item}} {%endfor%}', 'array' => [1, 2, 3])
     assert_template_result('123', '{%for item in array%}{{item}}{%endfor%}', 'array' => [1, 2, 3])
     assert_template_result('123', '{% for item in array %}{{item}}{% endfor %}', 'array' => [1, 2, 3])
-    assert_template_result('abcd', '{%for item in array%}{{item}}{%endfor%}', 'array' => %w[a b c d])
+    assert_template_result('abcd', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', 'b', 'c', 'd'])
     assert_template_result('a b c', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', ' ', 'b', ' ', 'c'])
     assert_template_result('abc', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', '', 'b', '', 'c'])
   end
@@ -74,8 +72,8 @@ HERE
   def test_for_helpers
     assigns = { 'array' => [1, 2, 3] }
     assert_template_result(' 1/3  2/3  3/3 ',
-                           '{%for item in array%} {{forloop.index}}/{{forloop.length}} {%endfor%}',
-                           assigns)
+      '{%for item in array%} {{forloop.index}}/{{forloop.length}} {%endfor%}',
+      assigns)
     assert_template_result(' 1  2  3 ', '{%for item in array%} {{forloop.index}} {%endfor%}', assigns)
     assert_template_result(' 0  1  2 ', '{%for item in array%} {{forloop.index0}} {%endfor%}', assigns)
     assert_template_result(' 2  1  0 ', '{%for item in array%} {{forloop.rindex0}} {%endfor%}', assigns)
@@ -87,8 +85,8 @@ HERE
   def test_for_and_if
     assigns = { 'array' => [1, 2, 3] }
     assert_template_result('+--',
-                           '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}',
-                           assigns)
+      '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}',
+      assigns)
   end
 
   def test_for_else
@@ -116,7 +114,7 @@ HERE
     exception = assert_raises(Liquid::ArgumentError) do
       Template.parse(template).render!(assigns)
     end
-    assert_equal('Liquid error: invalid integer', exception.message)
+    assert_equal("Liquid error: invalid integer", exception.message)
   end
 
   def test_limiting_with_invalid_offset
@@ -130,7 +128,7 @@ HERE
     exception = assert_raises(Liquid::ArgumentError) do
       Template.parse(template).render!(assigns)
     end
-    assert_equal('Liquid error: invalid integer', exception.message)
+    assert_equal("Liquid error: invalid integer", exception.message)
   end
 
   def test_dynamic_variable_limiting
@@ -159,14 +157,14 @@ HERE
       {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
-    MKUP
+      MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       789
-    XPCTD
+      XPCTD
     assert_template_result(expected, markup, assigns)
   end
 
@@ -178,14 +176,14 @@ HERE
       {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit:1 %}{{i}}{%endfor%}
-    MKUP
+      MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       7
-    XPCTD
+      XPCTD
     assert_template_result(expected, markup, assigns)
   end
 
@@ -197,14 +195,14 @@ HERE
       {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit:1000 %}{{i}}{%endfor%}
-    MKUP
+      MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       7890
-    XPCTD
+      XPCTD
     assert_template_result(expected, markup, assigns)
   end
 
@@ -227,19 +225,19 @@ HERE
     assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] } }
 
     markup = '{% for i in array.items %}{% break %}{% endfor %}'
-    expected = ''
+    expected = ""
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% break %}{% endfor %}'
-    expected = '1'
+    expected = "1"
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% break %}{{ i }}{% endfor %}'
-    expected = ''
+    expected = ""
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% if i > 3 %}{% break %}{% endif %}{% endfor %}'
-    expected = '1234'
+    expected = "1234"
     assert_template_result(expected, markup, assigns)
 
     # tests to ensure it only breaks out of the local for loop
@@ -267,23 +265,23 @@ HERE
     assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
 
     markup = '{% for i in array.items %}{% continue %}{% endfor %}'
-    expected = ''
+    expected = ""
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% continue %}{% endfor %}'
-    expected = '12345'
+    expected = "12345"
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% continue %}{{ i }}{% endfor %}'
-    expected = ''
+    expected = ""
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% if i > 3 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
-    expected = '123'
+    expected = "123"
     assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% if i == 3 %}{% continue %}{% else %}{{ i }}{% endif %}{% endfor %}'
-    expected = '1245'
+    expected = "1245"
     assert_template_result(expected, markup, assigns)
 
     # tests to ensure it only continues the local for loop and not all of them.
@@ -312,41 +310,41 @@ HERE
     # the functionality for backwards compatibility
 
     assert_template_result('test string',
-                           '{%for val in string%}{{val}}{%endfor%}',
-                           'string' => 'test string')
+      '{%for val in string%}{{val}}{%endfor%}',
+      'string' => "test string")
 
     assert_template_result('test string',
-                           '{%for val in string limit:1%}{{val}}{%endfor%}',
-                           'string' => 'test string')
+      '{%for val in string limit:1%}{{val}}{%endfor%}',
+      'string' => "test string")
 
     assert_template_result('val-string-1-1-0-1-0-true-true-test string',
-                           '{%for val in string%}' \
-                           '{{forloop.name}}-' \
-                           '{{forloop.index}}-' \
-                           '{{forloop.length}}-' \
-                           '{{forloop.index0}}-' \
-                           '{{forloop.rindex}}-' \
-                           '{{forloop.rindex0}}-' \
-                           '{{forloop.first}}-' \
-                           '{{forloop.last}}-' \
-                           '{{val}}{%endfor%}',
-                           'string' => 'test string')
+      '{%for val in string%}' \
+      '{{forloop.name}}-' \
+      '{{forloop.index}}-' \
+      '{{forloop.length}}-' \
+      '{{forloop.index0}}-' \
+      '{{forloop.rindex}}-' \
+      '{{forloop.rindex0}}-' \
+      '{{forloop.first}}-' \
+      '{{forloop.last}}-' \
+      '{{val}}{%endfor%}',
+      'string' => "test string")
   end
 
   def test_for_parentloop_references_parent_loop
     assert_template_result('1.1 1.2 1.3 2.1 2.2 2.3 ',
-                           '{% for inner in outer %}{% for k in inner %}' \
-                           '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
-                           '{% endfor %}{% endfor %}',
-                           'outer' => [[1, 1, 1], [1, 1, 1]])
+      '{% for inner in outer %}{% for k in inner %}' \
+      '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
+      '{% endfor %}{% endfor %}',
+      'outer' => [[1, 1, 1], [1, 1, 1]])
   end
 
   def test_for_parentloop_nil_when_not_present
     assert_template_result('.1 .2 ',
-                           '{% for inner in outer %}' \
-                           '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
-                           '{% endfor %}',
-                           'outer' => [[1, 1, 1], [1, 1, 1]])
+      '{% for inner in outer %}' \
+      '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
+      '{% endfor %}',
+      'outer' => [[1, 1, 1], [1, 1, 1]])
   end
 
   def test_inner_for_over_empty_input
@@ -354,7 +352,7 @@ HERE
   end
 
   def test_blank_string_not_iterable
-    assert_template_result('', '{% for char in characters %}I WILL NOT BE OUTPUT{% endfor %}', 'characters' => '')
+    assert_template_result('', "{% for char in characters %}I WILL NOT BE OUTPUT{% endfor %}", 'characters' => '')
   end
 
   def test_bad_variable_naming_in_for_loop

test/integration/tags/if_else_tag_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class IfElseTagTest < Minitest::Test
@@ -8,7 +6,7 @@ class IfElseTagTest < Minitest::Test
   def test_if
     assert_template_result('  ', ' {% if false %} this text should not go into the output {% endif %} ')
     assert_template_result('  this text should go into the output  ',
-                           ' {% if true %} this text should go into the output {% endif %} ')
+      ' {% if true %} this text should go into the output {% endif %} ')
     assert_template_result('  you rock ?', '{% if false %} you suck {% endif %} {% if true %} you rock {% endif %}?')
   end
 
@@ -51,12 +49,12 @@ class IfElseTagTest < Minitest::Test
 
   def test_comparison_of_expressions_starting_with_and_or_or
     assigns = { 'order' => { 'items_count' => 0 }, 'android' => { 'name' => 'Roy' } }
-    assert_template_result('YES',
-                           "{% if android.name == 'Roy' %}YES{% endif %}",
-                           assigns)
-    assert_template_result('YES',
-                           '{% if order.items_count == 0 %}YES{% endif %}',
-                           assigns)
+    assert_template_result("YES",
+      "{% if android.name == 'Roy' %}YES{% endif %}",
+      assigns)
+    assert_template_result("YES",
+      "{% if order.items_count == 0 %}YES{% endif %}",
+      assigns)
   end
 
   def test_if_and
@@ -77,14 +75,14 @@ class IfElseTagTest < Minitest::Test
     assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => nil)
     assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => true)
 
-    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => 'text')
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => "text")
     assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => true)
     assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => 1)
     assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => {})
     assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => [])
     assert_template_result(' YES ', '{% if "foo" %} YES {% endif %}')
     assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => true })
-    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => 'text' })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => "text" })
     assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => 1 })
     assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => {} })
     assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => [] })
@@ -92,11 +90,11 @@ class IfElseTagTest < Minitest::Test
     assert_template_result(' YES ', '{% if var %} NO {% else %} YES {% endif %}', 'var' => false)
     assert_template_result(' YES ', '{% if var %} NO {% else %} YES {% endif %}', 'var' => nil)
     assert_template_result(' YES ', '{% if var %} YES {% else %} NO {% endif %}', 'var' => true)
-    assert_template_result(' YES ', '{% if "foo" %} YES {% else %} NO {% endif %}', 'var' => 'text')
+    assert_template_result(' YES ', '{% if "foo" %} YES {% else %} NO {% endif %}', 'var' => "text")
 
     assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => { 'bar' => false })
     assert_template_result(' YES ', '{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => { 'bar' => true })
-    assert_template_result(' YES ', '{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => { 'bar' => 'text' })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => { 'bar' => "text" })
     assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => { 'notbar' => true })
     assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {})
     assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'notfoo' => { 'bar' => true })
@@ -134,7 +132,7 @@ class IfElseTagTest < Minitest::Test
   end
 
   def test_syntax_error_no_variable
-    assert_raises(SyntaxError) { assert_template_result('', '{% if jerry == 1 %}') }
+    assert_raises(SyntaxError){ assert_template_result('', '{% if jerry == 1 %}') }
   end
 
   def test_syntax_error_no_expression
@@ -156,7 +154,7 @@ class IfElseTagTest < Minitest::Test
     Condition.operators['contains'] = :[]
 
     assert_template_result('yes',
-                           %({% if 'gnomeslab-and-or-liquid' contains 'gnomeslab-and-or-liquid' %}yes{% endif %}))
+      %({% if 'gnomeslab-and-or-liquid' contains 'gnomeslab-and-or-liquid' %}yes{% endif %}))
   ensure
     Condition.operators['contains'] = original_op
   end
@@ -168,7 +166,7 @@ class IfElseTagTest < Minitest::Test
   end
 
   def test_multiple_conditions
-    tpl = '{% if a or b and c %}true{% else %}false{% endif %}'
+    tpl = "{% if a or b and c %}true{% else %}false{% endif %}"
 
     tests = {
       [true, true, true] => true,

test/integration/tags/include_tag_test.rb

@@ -1,39 +1,37 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class TestFileSystem
   def read_template_file(template_path)
     case template_path
-    when 'product'
-      'Product: {{ product.title }} '
+    when "product"
+      "Product: {{ product.title }} "
 
-    when 'locale_variables'
-      'Locale: {{echo1}} {{echo2}}'
+    when "locale_variables"
+      "Locale: {{echo1}} {{echo2}}"
 
-    when 'variant'
-      'Variant: {{ variant.title }}'
+    when "variant"
+      "Variant: {{ variant.title }}"
 
-    when 'nested_template'
+    when "nested_template"
       "{% include 'header' %} {% include 'body' %} {% include 'footer' %}"
 
-    when 'body'
+    when "body"
       "body {% include 'body_detail' %}"
 
-    when 'nested_product_template'
+    when "nested_product_template"
       "Product: {{ nested_product_template.title }} {%include 'details'%} "
 
-    when 'recursively_nested_template'
+    when "recursively_nested_template"
       "-{% include 'recursively_nested_template' %}"
 
-    when 'pick_a_source'
-      'from TestFileSystem'
+    when "pick_a_source"
+      "from TestFileSystem"
 
     when 'assignments'
       "{% assign foo = 'bar' %}"
 
     when 'break'
-      '{% break %}'
+      "{% break %}"
 
     else
       template_path
@@ -42,14 +40,14 @@ class TestFileSystem
 end
 
 class OtherFileSystem
-  def read_template_file(_template_path)
+  def read_template_file(template_path)
     'from OtherFileSystem'
   end
 end
 
 class CountingFileSystem
   attr_reader :count
-  def read_template_file(_template_path)
+  def read_template_file(template_path)
     @count ||= 0
     @count += 1
     'from CountingFileSystem'
@@ -57,17 +55,18 @@ class CountingFileSystem
 end
 
 class CustomInclude < Liquid::Tag
-  SYNTAX = /(#{Liquid::QUOTED_FRAGMENT}+)(\s+(?:with|for)\s+(#{Liquid::QUOTED_FRAGMENT}+))?/o.freeze
+  Syntax = /(#{Liquid::QuotedFragment}+)(\s+(?:with|for)\s+(#{Liquid::QuotedFragment}+))?/o
 
   def initialize(tag_name, markup, tokens)
-    markup =~ SYNTAX
-    @template_name = Regexp.last_match(1)
+    markup =~ Syntax
+    @template_name = $1
     super
   end
 
-  def parse(tokens); end
+  def parse(tokens)
+  end
 
-  def render_to_output_buffer(_context, output)
+  def render_to_output_buffer(context, output)
     output << @template_name[1..-2]
     output
   end
@@ -82,60 +81,60 @@ class IncludeTagTest < Minitest::Test
 
   def test_include_tag_looks_for_file_system_in_registers_first
     assert_equal 'from OtherFileSystem',
-                 Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: OtherFileSystem.new })
+      Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: OtherFileSystem.new })
   end
 
   def test_include_tag_with
-    assert_template_result 'Product: Draft 151cm ',
-                           "{% include 'product' with products[0] %}", 'products' => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }]
+    assert_template_result "Product: Draft 151cm ",
+      "{% include 'product' with products[0] %}", "products" => [ { 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' } ]
   end
 
   def test_include_tag_with_default_name
-    assert_template_result 'Product: Draft 151cm ',
-                           "{% include 'product' %}", 'product' => { 'title' => 'Draft 151cm' }
+    assert_template_result "Product: Draft 151cm ",
+      "{% include 'product' %}", "product" => { 'title' => 'Draft 151cm' }
   end
 
   def test_include_tag_for
-    assert_template_result 'Product: Draft 151cm Product: Element 155cm ',
-                           "{% include 'product' for products %}", 'products' => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }]
+    assert_template_result "Product: Draft 151cm Product: Element 155cm ",
+      "{% include 'product' for products %}", "products" => [ { 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' } ]
   end
 
   def test_include_tag_with_local_variables
-    assert_template_result 'Locale: test123 ', "{% include 'locale_variables' echo1: 'test123' %}"
+    assert_template_result "Locale: test123 ", "{% include 'locale_variables' echo1: 'test123' %}"
   end
 
   def test_include_tag_with_multiple_local_variables
-    assert_template_result 'Locale: test123 test321',
-                           "{% include 'locale_variables' echo1: 'test123', echo2: 'test321' %}"
+    assert_template_result "Locale: test123 test321",
+      "{% include 'locale_variables' echo1: 'test123', echo2: 'test321' %}"
   end
 
   def test_include_tag_with_multiple_local_variables_from_context
-    assert_template_result 'Locale: test123 test321',
-                           "{% include 'locale_variables' echo1: echo1, echo2: more_echos.echo2 %}",
-                           'echo1' => 'test123', 'more_echos' => { 'echo2' => 'test321' }
+    assert_template_result "Locale: test123 test321",
+      "{% include 'locale_variables' echo1: echo1, echo2: more_echos.echo2 %}",
+      'echo1' => 'test123', 'more_echos' => { "echo2" => 'test321' }
   end
 
   def test_included_templates_assigns_variables
-    assert_template_result 'bar', "{% include 'assignments' %}{{ foo }}"
+    assert_template_result "bar", "{% include 'assignments' %}{{ foo }}"
   end
 
   def test_nested_include_tag
-    assert_template_result 'body body_detail', "{% include 'body' %}"
+    assert_template_result "body body_detail", "{% include 'body' %}"
 
-    assert_template_result 'header body body_detail footer', "{% include 'nested_template' %}"
+    assert_template_result "header body body_detail footer", "{% include 'nested_template' %}"
   end
 
   def test_nested_include_with_variable
-    assert_template_result 'Product: Draft 151cm details ',
-                           "{% include 'nested_product_template' with product %}", 'product' => { 'title' => 'Draft 151cm' }
+    assert_template_result "Product: Draft 151cm details ",
+      "{% include 'nested_product_template' with product %}", "product" => { "title" => 'Draft 151cm' }
 
-    assert_template_result 'Product: Draft 151cm details Product: Element 155cm details ',
-                           "{% include 'nested_product_template' for products %}", 'products' => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }]
+    assert_template_result "Product: Draft 151cm details Product: Element 155cm details ",
+      "{% include 'nested_product_template' for products %}", "products" => [{ "title" => 'Draft 151cm' }, { "title" => 'Element 155cm' }]
   end
 
   def test_recursively_included_template_does_not_produce_endless_loop
     infinite_file_system = Class.new do
-      def read_template_file(_template_path)
+      def read_template_file(template_path)
         "-{% include 'loop' %}"
       end
     end
@@ -148,41 +147,41 @@ class IncludeTagTest < Minitest::Test
   end
 
   def test_dynamically_choosen_template
-    assert_template_result 'Test123', '{% include template %}', 'template' => 'Test123'
-    assert_template_result 'Test321', '{% include template %}', 'template' => 'Test321'
+    assert_template_result "Test123", "{% include template %}", "template" => 'Test123'
+    assert_template_result "Test321", "{% include template %}", "template" => 'Test321'
 
-    assert_template_result 'Product: Draft 151cm ', '{% include template for product %}',
-                           'template' => 'product', 'product' => { 'title' => 'Draft 151cm' }
+    assert_template_result "Product: Draft 151cm ", "{% include template for product %}",
+      "template" => 'product', 'product' => { 'title' => 'Draft 151cm' }
   end
 
   def test_include_tag_caches_second_read_of_same_partial
     file_system = CountingFileSystem.new
     assert_equal 'from CountingFileSystemfrom CountingFileSystem',
-                 Template.parse("{% include 'pick_a_source' %}{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
+      Template.parse("{% include 'pick_a_source' %}{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
     assert_equal 1, file_system.count
   end
 
   def test_include_tag_doesnt_cache_partials_across_renders
     file_system = CountingFileSystem.new
     assert_equal 'from CountingFileSystem',
-                 Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
+      Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
     assert_equal 1, file_system.count
 
     assert_equal 'from CountingFileSystem',
-                 Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
+      Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
     assert_equal 2, file_system.count
   end
 
   def test_include_tag_within_if_statement
-    assert_template_result 'foo_if_true', "{% if true %}{% include 'foo_if_true' %}{% endif %}"
+    assert_template_result "foo_if_true", "{% if true %}{% include 'foo_if_true' %}{% endif %}"
   end
 
   def test_custom_include_tag
     original_tag = Liquid::Template.tags['include']
     Liquid::Template.tags['include'] = CustomInclude
     begin
-      assert_equal 'custom_foo',
-                   Template.parse("{% include 'custom_foo' %}").render!
+      assert_equal "custom_foo",
+        Template.parse("{% include 'custom_foo' %}").render!
     ensure
       Liquid::Template.tags['include'] = original_tag
     end
@@ -192,8 +191,8 @@ class IncludeTagTest < Minitest::Test
     original_tag = Liquid::Template.tags['include']
     Liquid::Template.tags['include'] = CustomInclude
     begin
-      assert_equal 'custom_foo_if_true',
-                   Template.parse("{% if true %}{% include 'custom_foo_if_true' %}{% endif %}").render!
+      assert_equal "custom_foo_if_true",
+        Template.parse("{% if true %}{% include 'custom_foo_if_true' %}{% endif %}").render!
     ensure
       Liquid::Template.tags['include'] = original_tag
     end
@@ -209,16 +208,16 @@ class IncludeTagTest < Minitest::Test
 
   def test_passing_options_to_included_templates
     assert_raises(Liquid::SyntaxError) do
-      Template.parse('{% include template %}', error_mode: :strict).render!('template' => '{{ "X" || downcase }}')
+      Template.parse("{% include template %}", error_mode: :strict).render!("template" => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal 'x', Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: true).render!('template' => '{{ "X" || downcase }}')
+      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: true).render!("template" => '{{ "X" || downcase }}')
     end
     assert_raises(Liquid::SyntaxError) do
-      Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: [:locale]).render!('template' => '{{ "X" || downcase }}')
+      Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:locale]).render!("template" => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal 'x', Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: [:error_mode]).render!('template' => '{{ "X" || downcase }}')
+      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:error_mode]).render!("template" => '{{ "X" || downcase }}')
     end
   end
 
@@ -234,11 +233,11 @@ class IncludeTagTest < Minitest::Test
   end
 
   def test_including_via_variable_value
-    assert_template_result 'from TestFileSystem', "{% assign page = 'pick_a_source' %}{% include page %}"
+    assert_template_result "from TestFileSystem", "{% assign page = 'pick_a_source' %}{% include page %}"
 
-    assert_template_result 'Product: Draft 151cm ', "{% assign page = 'product' %}{% include page %}", 'product' => { 'title' => 'Draft 151cm' }
+    assert_template_result "Product: Draft 151cm ", "{% assign page = 'product' %}{% include page %}", "product" => { 'title' => 'Draft 151cm' }
 
-    assert_template_result 'Product: Draft 151cm ', "{% assign page = 'product' %}{% include page for foo %}", 'foo' => { 'title' => 'Draft 151cm' }
+    assert_template_result "Product: Draft 151cm ", "{% assign page = 'product' %}{% include page for foo %}", "foo" => { 'title' => 'Draft 151cm' }
   end
 
   def test_including_with_strict_variables
@@ -249,7 +248,7 @@ class IncludeTagTest < Minitest::Test
   end
 
   def test_break_through_include
-    assert_template_result '1', '{% for i in (1..3) %}{{ i }}{% break %}{{ i }}{% endfor %}'
-    assert_template_result '1', "{% for i in (1..3) %}{{ i }}{% include 'break' %}{{ i }}{% endfor %}"
+    assert_template_result "1", "{% for i in (1..3) %}{{ i }}{% break %}{{ i }}{% endfor %}"
+    assert_template_result "1", "{% for i in (1..3) %}{{ i }}{% include 'break' %}{{ i }}{% endfor %}"
   end
 end # IncludeTagTest

test/integration/tags/increment_tag_test.rb

@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'test_helper'
 
 class IncrementTagTest < Minitest::Test
@@ -9,17 +7,17 @@ class IncrementTagTest < Minitest::Test
     assert_template_result('0', '{%increment port %}', {})
     assert_template_result('0 1', '{%increment port %} {%increment port%}', {})
     assert_template_result('0 0 1 2 1',
-                           '{%increment port %} {%increment starboard%} ' \
-                           '{%increment port %} {%increment port%} ' \
-                           '{%increment starboard %}', {})
+      '{%increment port %} {%increment starboard%} ' \
+      '{%increment port %} {%increment port%} ' \
+      '{%increment starboard %}', {})
   end
 
   def test_dec
-    assert_template_result('9', '{%decrement port %}', 'port' => 10)
+    assert_template_result('9', '{%decrement port %}', { 'port' => 10 })
     assert_template_result('-1 -2', '{%decrement port %} {%decrement port%}', {})
     assert_template_result('1 5 2 2 5',
-                           '{%increment port %} {%increment starboard%} ' \
-                           '{%increment port %} {%decrement port%} ' \
-                           '{%decrement starboard %}', 'port' => 1, 'starboard' => 5)
+      '{%increment port %} {%increment starboard%} ' \
+      '{%increment port %} {%decrement port%} ' \
+      '{%decrement starboard %}', { 'port' => 1, 'starboard' => 5 })
   end
 end