docs: def prettyln(text, fill='-', align='^', prefix='[ ', suffix=' ]', length=69):
      """Wrap `text` in a pretty line with maximum length."""
      text = '{prefix}{0}{suffix}'.format(text, prefix=prefix, suffix=suffix)
      print(
          "{0:{fill}{align}{length}}".format(
              text, fill=fill, align=align, length=length
          )
      )