filtered variables for assign, case, and cycle

lib/liquid/tags/assign.rb

@@ -9,7 +9,7 @@ module Liquid
   #  {{ monkey }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(#{QuotedFragment}+)/   
+    Syntax = /(#{VariableSignature}+)\s*=\s*(#{Expression}+)/   
   
     def initialize(tag_name, markup, tokens)          
       if markup =~ Syntax

lib/liquid/tags/case.rb

@@ -1,7 +1,7 @@
 module Liquid
   class Case < Block
-    Syntax     = /(#{QuotedFragment})/
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/
+    Syntax     = /(#{Expression})/
+    WhenSyntax = /(#{Expression})(?:(?:\s+or\s+|\s*\,\s*)(#{Expression}.*))?/
 
     def initialize(tag_name, markup, tokens)      
       @blocks = []

lib/liquid/tags/cycle.rb

@@ -13,8 +13,8 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /#{QuotedFragment}/        
-    NamedSyntax = /(#{QuotedFragment})\s*\:\s*(.*)/
+    SimpleSyntax = /#{Expression}/        
+    NamedSyntax = /(#{Expression})\s*\:\s*(.*)/
   
     def initialize(tag_name, markup, tokens)      
       case markup
@@ -49,7 +49,7 @@ module Liquid
   
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-    	  var =~ /\s*(#{QuotedFragment})\s*/
+    	  var =~ /\s*(#{Expression})\s*/
     	  $1 ? $1 : nil
     	end.compact
     end