anchor.diff:  
   template extends ArrayList implements Serializable;
   
  -#renderer hello()
  +#def hello()
     Hello World
   #end
   --------------------------------------
  
positive.code: Renderer call
  ~~~~~~~~~~~~~
  
  Within a renderer, another renderer can be called with the directive +#render+. The syntax is like a function call in Java.
  
  Exemple:
  --------------------------------------
  #renderer hello()
    Hello
    #render name("World")
  #end
  #renderer name(String n)
    $(n)
  #end
  --------------------------------------
  
negative.code: --------------------------------------
  package org.acme;
  
  #def hello()
    Hello World
  #end
  --------------------------------------
  