anchor.diff:     ;
   
   line
  -   :lbl? (assemblerdirective | instruction)? comment?
  +   : lbl? (assemblerdirective | instruction)? comment?
      ;
   
   instruction
  
positive.code:    ;
  
  include
     : INCLUDE string
     ;
  
  expressionlist
  
negative.code:    ;
  
  
  RW
     : R W
     ;
  
  
  COMMENT
     : ';' ~ [\r\n]*
     ;
  