docs: def formatDuration(self, duration):
          """Format the duration.
  
          This method could be overridden if really needed, as the duration format in gerrit
          is an arbitrary string.
          :param duration: duration in timedelta
          """
          days = duration.days
          hours, remainder = divmod(duration.seconds, 3600)
          minutes, seconds = divmod(remainder, 60)
          if days:
              return '{} day{} {}h {}m {}s'.format(days, "s" if days > 1 else "",
                                                   hours, minutes, seconds)
          elif hours:
              return '{}h {}m {}s'.format(hours, minutes, seconds)
          return '{}m {}s'.format(minutes, seconds)