anchor.diff:  
   ==== Converter code
   
  -[code, ruby]
  +[source, ruby]
   ----
   class Converter
   
  
positive.code: 
  ==== Html5ConverterExtensions in more detail
  
  [code, ruby]
  ----
  module Html5ConverterExtensions
  
  
negative.code: 
  ==== A typical node handler
  
  [source, ruby]
  ----
  def handle_equation(node)
    options = node.attributes['options']
  