anchor.diff:  
   //Run vulcanize with no exclusions
   vulcanizeNoExclusion(String filepath) {
  -  FilePath htmlFile = _buildDir.join('web', filepath);
  +  FilePath htmlFile = _buildDir.join(filepath);
     log('${htmlFile.path} original: ${_printSize(htmlFile)}');
     ProcessResult result = Process.runSync('vulcanize',
         ['--strip-comments', '--inline-css', '--inline-scripts', filepath],
  -      workingDirectory: 'build/web');
  +      workingDirectory: _buildDir.path);
     if (result.exitCode != 0) {
       fail('error running vulcanize: ${result.exitCode}\n${result.stderr}');
     }
  
positive.code:       }
      }
  
      log('\nexecute: `gcloud app deploy build/web/app.yaml --project=dart-pad --no-promote`');
    });
  }
  
  
negative.code: import 'package:yaml/yaml.dart' as yaml;
  
  final FilePath _buildDir = FilePath('build');
  final FilePath _pkgDir = FilePath('third_party/pkg');
  final FilePath _routeDir = FilePath('third_party/pkg/route.dart');
  final FilePath _haikunatorDir = FilePath('third_party/pkg/haikunatordart');
  