anchor.diff:    }
   
     void requestExit() {
  +    print('** Requesting script to exit.');
       process.stdin.add([32, 13, 10]);
     }
   }
  
positive.code: 
    Future<int> launch() {
      String dartExecutable = Platform.executable;
      return Process.start(dartExecutable,
                           ['--enable-vm-service:0', scriptPath]).then((p) {
  
  
negative.code:           completer.complete(portNumber);
            // Stop repeat completions.
            first = false;
            print('** Signaled to run test queries on $portNumber');
          }
          print(line);
        });
  