Embed layout_parts in layout and correct typo

lib/parser.rb

@@ -230,12 +230,8 @@ module Parser
   def parser_layout_layout_part(layout )
     Radius::Context.new do |c|
       c.define_tag 'javascripts' do |tag|
-        contents = tag.expand
-        contents.to_s
       end
       c.define_tag 'stylesheets' do |tag|
-        contents = tag.expand
-        contents.to_s
       end
       c.define_tag 'layout_part' do |tag|
         data={}