docs: def get_config_multiline_option(parser: ConfigParser,
                                  section: str,
                                  option: str,
                                  default: List[str] = None) -> List[str]:
      """
      Retrieves a multi-line string value from a parser as a list of strings
      (one per line, ignoring blank lines).
  
      Args:
          parser: instance of :class:`ConfigParser`
          section: section name within config file
          option: option (variable) name within that section
          default: value to return if option is absent (``None`` is mapped to
              ``[]``)
  
      Returns:
          list of strings
  
      Raises:
          ValueError: if the section is absent
  
      """
      default = default or []
      if not parser.has_section(section):
          raise ValueError("config missing section: " + section)
      try:
          multiline = parser.get(section, option)
          values = [x.strip() for x in multiline.splitlines() if x.strip()]
          return values
      except NoOptionError:
          return default