anchor.diff:  
   [source,ruby]
   ----
  +require 'hobby'
  +
   class C
     include Hobby
   
  
positive.code: 
  [source,ruby]
  ----
  require 'hobby'
  
  class App
    include Hobby
  
  
negative.code: 
  [source,ruby]
  ----
  class App
    include Hobby
    # matches both /hi/hobbit and /hi/patricio
  