anchor.diff:  
   == Decorators ==
   
  -Golo feature Python-like decorators.
  +Golo features Python-like decorators.
   
   === Presentation ===
   //<<<
  
positive.code: annotations are compiler or VM directives, decorators are actually plain
  functions, more precisely higher order functions.
  
  NOTE: Higher order functions (HOF) are functions that process functions, i.e. that take 
  a function as parameter, and may return a new function.
  
  A decorator is thus a function that take the function to decorate as parameter,
  
negative.code: function mul = |v| -> 10 * v
  ----
  
  Several factory functions are available in
  link:./golodoc/gololang/Decorators[`gololang.Decorators`] to ease the creation
  of checkers:
  
  * `any` is a void checker that does nothing. It can used when you need to check
  