anchor.diff:  
     /// Gets the current progress time as a parenthesized, formatted string.
     String get _time => "(${niceDuration(_stopwatch.elapsed)})";
  +
  +  /// Last printed time length
  +  int _timeLength = 0;
   
     /// Creates a new progress indicator.
     ///
  
positive.code:   void _update() {
      if (log.isMuted) return;
  
      stdout.write(log.format("\r$_message... "));
  
      // Show the time only once it gets noticeably long.
      if (_stopwatch.elapsed.inSeconds > 0) stdout.write("${log.gray(_time)} ");
    }
  }
  
negative.code:       _update();
      });
  
      stdout.write(log.format("$_message... "));
    }
  
    /// Stops the progress indicator.
  