docs: def format_checksum(checksum_pyxb):
      """Create string representation of a PyXB Checksum object.
  
      Args:
        PyXB Checksum object
  
      Returns:
        str : Combined hexadecimal value and algorithm name.
  
      """
      return '{}/{}'.format(
          checksum_pyxb.algorithm.upper().replace('-', ''), checksum_pyxb.value().lower()
      )