anchor.diff:    List<String> stdout;
     List<String> stderr;
     List<Function> handlers;
  -  bool allowRetries = false;
  +  bool allowRetries;
   
     /** Which command of [testCase.commands] is currently being executed. */
     int currentStep;
   
     RunningProcess(TestCase this.testCase,
  -      [this.allowRetries, this.processQueue]);
  +      [this.allowRetries = false, this.processQueue]);
   
     /**
      * Called when all commands are executed. [exitCode] is 0 if all command
  
positive.code:   }
  
    /**
     * Sometimes Webdriver doesn't close every browser window when it's done
     * with a test. At the end of all tests we clear out any neglected processes
     * that are still running.
     */
    void killZombieBrowsers() {
      String chromeName = 'chrome';
      if (new Platform().operatingSystem() == 'macos') {
        chromeName = 'Google\ Chrome';
      }
      Map<String, List<String>> processNames = {'ie': ['iexplore'],
          'safari': ['Safari'], 'ff': ['firefox', 'firefox-bin'],
          'chrome': ['chromedriver', chromeName]};
      for (String name in processNames[browserUsed]) {
        Process process = null;
        if (new Platform().operatingSystem() == 'windows') {
          process = new Process.start(
              'C:\\Windows\\System32\\taskkill.exe', ['/F', '/IM', name + '.exe',
              '/T']);
        } else {
          process = new Process.start('killall', ['-9', name]);
        }
  
        if (name == processNames[browserUsed].last()) {
          process.onExit = (exitCode) {
            process.close();
            _progress.allDone();
          };
          process.onError = (error) {
            _progress.allDone();
          };
        } else {
          process.onExit = (exitCode) {
            process.close();
          };
        }
      }
    }
  
    /**
     * Perform any cleanup needed once all tests in a TestSuite have completed
     * and notify our progress indicator that we are done.
     */
    void _cleanupAndMarkDone() {
      if (browserUsed != '' && _progress is BuildbotProgressIndicator) {
        killZombieBrowsers();
        if (_seleniumServer != null) {
          _seleniumServer.kill();
        }
      } else {
        _progress.allDone();
      }
  
negative.code:         _tests.addFirst(test);
          return;
        }
        if (_verbose) {
          int i = 1;
          for (Command command in test.commands) {
            print('$i. ${command.commandLine}');
            i++;
          }
        }
        _progress.start(test);
        Function oldCallback = test.completedHandler;
        Function wrapper = (TestCase test_arg) {
  