docs: def format_property(name, value):
      """Format the name and value (both unicode) of a property as a string."""
      result = b''
      utf8_name = utf8_bytes_string(name)
  
      result = b'property ' + utf8_name
      if value is not None:
          utf8_value = utf8_bytes_string(value)
          result += b' ' + ('%d' % len(utf8_value)).encode('ascii') + b' ' + utf8_value
  
      return result