allow incomplete tags inside a comment tag

lib/liquid/block_body.rb

@@ -6,6 +6,7 @@ module Liquid
   class BlockBody
     LiquidTagToken      = /\A\s*(#{TagName})\s*(.*?)\z/o
     FullToken           = /\A#{TagStart}#{WhitespaceControl}?(\s*)(#{TagName})(\s*)(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
+    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}#{WhitespaceControl}?\s*(\w+)\s*(.*)?#{WhitespaceControl}?#{TagEnd}\z/om
     ContentOfVariable   = /\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
     WhitespaceOrNothing = /\A\s*\z/
     TAGSTART            = "{%"

lib/liquid/tags/comment.rb

@@ -41,7 +41,7 @@ module Liquid
         # The children tag doesn't require to be a valid Liquid except the comment and raw tag.
         # The child comment and raw tag must be closed.
         while (token = tokens.send(:shift))
-          tag_name_match = BlockBody::FullToken.match(token)
+          tag_name_match = BlockBody::FullTokenPossiblyInvalid.match(token)
 
           next if tag_name_match.nil?
 
@@ -69,7 +69,7 @@ module Liquid
 
     def parse_raw_tag_body(tokens)
       while (token = tokens.send(:shift))
-        return if token =~ Raw::FullTokenPossiblyInvalid && "endraw" == Regexp.last_match(2)
+        return if token =~ BlockBody::FullTokenPossiblyInvalid && "endraw" == Regexp.last_match(2)
       end
 
       raise_tag_never_closed("raw")

lib/liquid/tags/raw.rb

@@ -14,7 +14,6 @@ module Liquid
   # @liquid_syntax_keyword expression The expression to be output without being rendered.
   class Raw < Block
     Syntax = /\A\s*\z/
-    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}#{WhitespaceControl}?\s*(\w+)\s*(.*)?#{WhitespaceControl}?#{TagEnd}\z/om
 
     def initialize(tag_name, markup, parse_context)
       super
@@ -25,7 +24,7 @@ module Liquid
     def parse(tokens)
       @body = +''
       while (token = tokens.shift)
-        if token =~ FullTokenPossiblyInvalid && block_delimiter == Regexp.last_match(2)
+        if token =~ BlockBody::FullTokenPossiblyInvalid && block_delimiter == Regexp.last_match(2)
           parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
           @body << Regexp.last_match(1) if Regexp.last_match(1) != ""
           return