Revert some freezes on non-literals

lib/liquid/block.rb

@@ -92,7 +92,7 @@ module Liquid
     end
 
     def block_delimiter
-      "end#{block_name}".freeze
+      "end#{block_name}"
     end
 
     def block_name

lib/liquid/condition.rb

@@ -61,7 +61,7 @@ module Liquid
     end
 
     def inspect
-      "#<Condition #{[@left, @operator, @right].compact.join(' '.freeze)}>".freeze
+      "#<Condition #{[@left, @operator, @right].compact.join(' '.freeze)}>"
     end
 
     private
@@ -94,7 +94,7 @@ module Liquid
 
       left, right = context[left], context[right]
 
-      operation = self.class.operators[op] || raise(ArgumentError.new("Unknown operator #{op}".freeze))
+      operation = self.class.operators[op] || raise(ArgumentError.new("Unknown operator #{op}"))
 
       if operation.respond_to?(:call)
         operation.call(self, left, right)

lib/liquid/context.rb

@@ -45,7 +45,7 @@ module Liquid
     def add_filters(filters)
       filters = [filters].flatten.compact
       filters.each do |f|
-        raise ArgumentError, "Expected module but got: #{f.class}".freeze unless f.is_a?(Module)
+        raise ArgumentError, "Expected module but got: #{f.class}" unless f.is_a?(Module)
         Strainer.add_known_filter(f)
       end
 
@@ -82,9 +82,9 @@ module Liquid
 
       case e
       when SyntaxError
-        "Liquid syntax error: #{e.message}".freeze
+        "Liquid syntax error: #{e.message}"
       else
-        "Liquid error: #{e.message}".freeze
+        "Liquid error: #{e.message}"
       end
     end
 

lib/liquid/file_system.rb

@@ -51,13 +51,13 @@ module Liquid
 
     def read_template_file(template_path, context)
       full_path = full_path(template_path)
-      raise FileSystemError, "No such template '#{template_path}'".freeze unless File.exists?(full_path)
+      raise FileSystemError, "No such template '#{template_path}'" unless File.exists?(full_path)
 
       File.read(full_path)
     end
 
     def full_path(template_path)
-      raise FileSystemError, "Illegal template name '#{template_path}'".freeze unless template_path =~ /^[^.\/][a-zA-Z0-9_\/]+$/
+      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ /^[^.\/][a-zA-Z0-9_\/]+$/
 
       full_path = if template_path.include?('/'.freeze)
         File.join(root, File.dirname(template_path), @pattern % File.basename(template_path))
@@ -65,7 +65,7 @@ module Liquid
         File.join(root, @pattern % template_path)
       end
 
-      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'".freeze unless File.expand_path(full_path) =~ /^#{File.expand_path(root)}/
+      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'" unless File.expand_path(full_path) =~ /^#{File.expand_path(root)}/
 
       full_path
     end

lib/liquid/module_ex.rb

@@ -43,7 +43,7 @@
 class Module
 
   def liquid_methods(*allowed_methods)
-    drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end".freeze
+    drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end"
     define_method :to_liquid do
       drop_class.new(self)
     end

lib/liquid/parser.rb

@@ -56,7 +56,7 @@ module Liquid
         consume(:dotdot)
         last = expression
         consume(:close_round)
-        "(#{first}..#{last})".freeze
+        "(#{first}..#{last})"
       else
         raise SyntaxError, "#{token} is not a valid expression"
       end
@@ -70,7 +70,7 @@ module Liquid
       end
 
       str << expression
-      str.freeze
+      str
     end
 
     def variable_signature