anchor.diff:  //
   // Hitting a colon in default mode switches over to the value mode
   
  -fragment
  -Colon
  -:
  -  ':'
  -;
  -
   ColonSpace
   :
     ':' ' '+ -> pushMode ( valueMode )
  
positive.code: fragment
  ESC2
  :
    '\\' [nWt:,;"[\]{}] // TODO: Actually, ";" cannot be escaped
  
  ;
  
  
negative.code: :
    ' '
  ;
  
  // A string without any space or non-alphanumeric character with special meaning
  
  Word
  :
    (
      ESC2
      | ~[ \r\n[\]{},="]
  
    )+
  ;
  