anchor.diff:  
     final bool verbose;
   
  -  static const String dartdevDescription =
  -      'A command-line utility for Dart development';
  +  Analytics _analytics;
   
     DartdevRunner(List<String> args)
         : verbose = args.contains('-v') || args.contains('--verbose'),
  
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: }
  
  class DartdevRunner extends CommandRunner<int> {
    static const String dartdevDescription =
        'A command-line utility for Dart development';
  
    @override
    final ArgParser argParser = ArgParser(
      usageLineLength: dartdevUsageLineLength,
  