anchor.diff:  
   for example, to automatically use line numbering with .cc files,
   use the following command:
  +
   -----------------------------------------------------
   :hook global WinCreate .*\.cc %{ addhl number_lines }
   -----------------------------------------------------
  
positive.code: 
  commands can be registred to be executed when certain events arise.
  to register a hook, use the hook command.
  ------------------------------------------------------
  :hook <scope> <hook_name> <filtering_regex> <commands>
  ------------------------------------------------------
  <scope> can be either global, buffer or window, the scope are hierarchical,
  meaning that a Window calling a hook will execute it's own, the buffer ones
  and the global ones.
  
negative.code: -----------------
  
  new commands can be defined using the +def+ command.
  
  ------------------------------
  :def <command_name> <commands>
  ------------------------------
  
  <commands> is a string containing the commands to execute
  
  def can also takes some flags:
  