anchor.diff:      :   'for'
       ;
   
  +FAIL
  +    :   'fail'
  +    ;
  +
   GIVEN
       :   'given'
       ;
  
positive.code:         )*
          '*/'
          ;
  
  ASSIGN
      :   'assign'
  
negative.code:     | 'object'
      | 'choice'
      | 'alias'
      | 'specify'
      ;
  
  //by making these things keywords, we reduce the amount of
  