def _log_save_errors(self, ex_errs):
        """Log errors due to bad Augeas save.

        :param list ex_errs: Existing errors before save

        """
        # Check for the root of save problems
        new_errs = self.aug.match("/augeas//error")
        # logger.error("During Save - %s", mod_conf)
        logger.error("Unable to save files: %s. Attempted Save Notes: %s",
                     ", ".join(err[13:len(err) - 6] for err in new_errs
                               # Only new errors caused by recent save
                               if err not in ex_errs), self.save_notes)

    # Wrapper functions for Reverter class
dataset/ETHPy150Open letsencrypt/letsencrypt/certbot-apache/certbot_apache/augeas_configurator.py/AugeasConfigurator._log_save_errors/original