Custom liquid tag for creating code blocks

lib/jekyll/blocks.rb

@@ -0,0 +1,15 @@
+module Jekyll
+  class Highlight < Liquid::Block
+    include Liquid::StandardFilters
+    
+    def initialize(tag_name, lang, tokens)
+      super
+      @lang = lang.strip
+    end
+  
+    def render(context)
+      "<pre class='syntax-highlight:#{@lang}'>#{escape(super)}</pre>"
+    end    
+  end
+end
+Liquid::Template.register_tag('highlight', Jekyll::Highlight)