code: def edge_just(left, right, width, fillchar=' ', min_padding_length=1):
      
      assert unicode_width(fillchar) == 1, 'fillchar must be single-width char'
      padding = fillchar * max(min_padding_length, width - unicode_width(left + right))
      return left + padding + right
docs: :param left:
      :param right:
      :param width:
      :param fillchar:
      :param min_padding_length: minimum padding length
      :return: