anchor.diff:  class Options {
     final _parser = ArgParser(allowTrailingOptions: false);
     ArgResults _results;
  -  bool get onlyUnprioritized = _results['only-unprioritized']
  -  int get exitCode => _results == null ? -1 : _results['help'] ? 0 : null;
  +  bool get onlyUnprioritized => _results['only-unprioritized'];
  +  int get exitCode => _results == null
  +      ? -1
  +      : _results['help']
  +          ? 0
  +          : null;
   
     Options(List<String> args) {
       _parser
         ..addFlag('help',
             defaultsTo: false, abbr: 'h', negatable: false, help: 'get usage')
  -      ..addFlag('only-unprioritized', defaultsTo: false, abbr: 'o', negatable: true, help: 'only issues without a label P0-P6');
  +      ..addFlag('only-unprioritized',
  +          defaultsTo: false,
  +          abbr: 'o',
  +          negatable: true,
  +          help: 'only issues without a label P0-P6');
       try {
         _results = _parser.parse(args);
         if (_results['help']) _printUsage();
  
positive.code:       }
        if (skip) continue;
      }
  
  
      var resultTsv = issue.toTsv();
  
  
negative.code:   print('${Issue.tsvHeader}\tPositive\tNegative\tNeutral\tTotal');
  
    for (var issue in issues) {
      // If we're not interested in issues with priority labels,
      // skip this label if it has a priority.
      if (opts.onlyUnprioritized) {
        bool skip = false;
        for (var label in issue.labels.labels) {
          if (skipLabels.contains(label.name)) {
            skip = true;
            break;
  