anchor.diff:  	| widthStmt
   	| withStmt
   	| writeStmt
  +	| implicitCallStmt_InBlock
   ;
   
   
   // statements ----------------------------------
   
  -appactivateStmt : APPACTIVATE WS valueStmt (WS? ',' WS? valueStmt)?;
  +appactivateStmt : APPACTIVATE WS valueStmt (WS? COMMA WS? valueStmt)?;
   
   beepStmt : BEEP;
   
  
positive.code: /*
  * Copyright (C) 2014 Ulrich Wolffgang <u.wol@wwu.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as 
  
negative.code: 	| goToStmt
  	| ifThenElseStmt
  	| implementsStmt
  	| inputStmt
  	| killStmt
  	| letStmt
  