docs: def get_plain_text(self):
          """Returns a list"""
          _msg = self.message if self.message is not None else [""]
          msg = _msg if isinstance(_msg, list) else [_msg]
          line = "" if not self.line else ", line {}".format(self.line)
          ret = ["{} found in file '{}'{}::".format(self.type.capitalize(), self.filename, line),
                 "  <<"]+ \
                ["    "+x for x in msg]+ \
                ["  >>"]
          return ret