docs: def describe_delta(delta):
      """
      Describe this timedelta in human-readable terms.
  
      :param delta: datetime.timedelta object
      :returns: str, describing this delta
      """
      s = delta.total_seconds()
      s = abs(s)
      hours, remainder = divmod(s, 3600)
      minutes, seconds = divmod(remainder, 60)
      if hours:
          return '%d hr %d min' % (hours, minutes)
      if minutes:
          return '%d min %d secs' % (minutes, seconds)
      return '%d secs' % seconds