'Log errors due to bad Augeas save.
:param list ex_errs: Existing errors before save'

def _log_save_errors(self, ex_errs):

    new_errs = self.aug.match('/augeas//error')
    logger.error('Unable    to    save    files:    %s.    Attempted    Save    Notes:    %s', ',    '.join((err[13:(len(err) - 6)] for err in new_errs if (err not in ex_errs))), self.save_notes)
