code: def make_parse_err(self, err, reformat=True, include_ln=True):
          
          err_line = err.line
          err_index = err.col - 1
          err_lineno = err.lineno if include_ln else None
          if reformat:
              err_line, err_index = self.reformat(err_line, err_index)
              if err_lineno is not None:
                  err_lineno = self.adjust(err_lineno)
          return CoconutParseError(None, err_line, err_index, err_lineno)
docs: Make a CoconutParseError from a ParseBaseException.