anchor.diff:  }
   
   class DartdevRunner extends CommandRunner<int> {
  +  static const String dartdevDescription =
  +      'A command-line utility for Dart development';
  +
     @override
     final ArgParser argParser = ArgParser(
       usageLineLength: dartdevUsageLineLength,
  
positive.code:     addCommand(TestCommand());
    }
  
    @override
    String get usageFooter =>
        'See https://dart.dev/tools/dart-tool for detailed documentation.';
  
    @override
    String get invocation =>
        'dart ${verbose ? '[vm-options] ' : ''}<command|dart-file> [arguments]';
  
    @visibleForTesting
    Analytics get analytics => _analytics;
    Analytics _analytics;
  
    @override
    Future<int> runCommand(ArgResults topLevelResults) async {
  
negative.code: 
    final bool verbose;
  
    Analytics _analytics;
  
    DartdevRunner(List<String> args)
        : verbose = args.contains('-v') || args.contains('--verbose'),
  