put line number in parentheses

lib/liquid/context.rb

@@ -92,8 +92,8 @@ module Liquid
     end
 
 
-    def handle_error(e, token)
-      e = Liquid::Error.error_with_line_number(e, token)
+    def handle_error(e, token=nil)
+      e = Liquid::Error.error_from_token(e, token) if token
       errors.push(e)
       raise if exception_handler && exception_handler.call(e)
       Liquid::Error.render(e)

lib/liquid/errors.rb

@@ -4,24 +4,21 @@ module Liquid
 
     def self.render(e)
       msg = if e.is_a?(Liquid::Error) && e.line_number
-        "#{e.line_number}: #{e.message}"
+        " (line #{e.line_number}): #{e.message}"
       else
-        e.message
+        ": #{e.message}"
       end
 
       case e
       when SyntaxError
-        "Liquid syntax error: #{msg}"
+        "Liquid syntax error" << msg
       else
-        "Liquid error: #{msg}"
+        "Liquid error" << msg
       end
     end
 
-    def self.error_with_line_number(e, token)
-      if e.is_a?(Liquid::Error)
-        e.set_line_number_from_token(token)
-      end
-
+    def self.error_from_token(e, token)
+      e.set_line_number_from_token(token) if e.is_a?(Liquid::Error)
       e
     end
 

lib/liquid/parser_switching.rb

@@ -8,7 +8,7 @@ module Liquid
         begin
           return strict_parse_with_error_context(markup)
         rescue SyntaxError => e
-          e.line_number = markup.line_number if markup.is_a?(Token)
+          e.set_line_number_from_token(markup)
           @warnings ||= []
           @warnings << e
           return lax_parse(markup)
@@ -28,4 +28,4 @@ module Liquid
       " in \"#{markup.strip}\"" 
     end
   end
-end
+end

test/integration/error_handling_test.rb

@@ -40,13 +40,13 @@ class ErrorHandlingTest < Minitest::Test
     expected = <<-TEXT
       Hello,
 
-      Liquid error: 3: standard error will raise a standard error.
+      Liquid error (line 3): standard error will raise a standard error.
 
       Bla bla test.
 
-      Liquid syntax error: 7: syntax error will raise a syntax error.
+      Liquid syntax error (line 7): syntax error will raise a syntax error.
 
-      This is an argument error: Liquid error: 9: argument error
+      This is an argument error: Liquid error (line 9): argument error
 
       Bla.
     TEXT