anchor.diff:      MatlabParser parser = new MatlabParser(tokens);
       parser.offsetTracker = offsetTracker;
       try {
  -        parser.array();
  +        parser.program();
       } catch (RecognitionException e) {
           parser.problems.add(parser.makeProblem(e));
       }
  
positive.code: t_WHILE : WHILE { offsetTracker.advanceInLine(5); };
  
  //class-specific keywords (IDENTIFIER + predicate)
  t_EVENTS : { input.LT(1).getText.equals("events") }? IDENTIFIER { offsetTracker.advanceInLine(6); };
  t_METHODS : { input.LT(1).getText.equals("methods") }? IDENTIFIER { offsetTracker.advanceInLine(7); };
  t_PROPERTIES : { input.LT(1).getText.equals("properties") }? IDENTIFIER { offsetTracker.advanceInLine(10); };
  
  t_PLUS : PLUS { offsetTracker.advanceInLine(1); };
  t_MINUS : MINUS { offsetTracker.advanceInLine(1); };
  
negative.code:   ;
  
  cmd_args :
       cmd_args_helper -> template(formatted={CommandFormatter.format($text, $cmd_args_helper.start.getLine(), $cmd_args_helper.start.getCharPositionInLine() + 1, offsetTracker, problems)}) "<formatted>"
    ;
  
  //NB: use actual tokens, not t_ non-terminals
  