anchor.diff:    }) async {
       String canceled;
       Timer timeoutTimer = new Timer(timeout, () {
  -      abort('Timed out awaiting successful response to "$message"', timeout: true);
  +      abort('Timed out awaiting successful response to "$message".', timeout: true);
       });
       AbortWatcher handleAbort = (String message) { canceled = message; };
       _abortWatchers.add(handleAbort);
  
positive.code:     try {
        return int.parse(response, radix: 10);
      } on FormatException {
        throw new TelevisionErrorResponse('Unknown response to "HPOS" message', response, this);
      }
    }
  
  
negative.code:           DC11: '${channel[1]}${channel[2]}${channel[3]}${channel[4]}',
          );
        default:
          throw new TelevisionException('Unknown TV channel format.', format, null);
      }
    }
  
  