code: function(data) {
      data = data.replace(/{% highlight ([^ ]*) %}/g, '<pre class="prettyprint lang-$1">');
      data = data.replace(/{% endhighlight %}/g, '</pre>');
      return data;
    }
docs: Replaces liquid tag highlight directives with prettyprint HTML tags.
  
  @param {String} The text for a post
  @return {String}