def rev_older_than(self, rev1, rev2):
        return self.normalize_rev(rev1) < self.normalize_rev(rev2)
Check whether disk layout is unchanged.
dataset/ETHPy150Open edgewall/trac/tracopt/versioncontrol/svn/svn_fs.py/SubversionRepository.rev_older_than--crossover with--dataset/ETHPy150Open openstack/ironic/ironic/drivers/modules/deploy_utils.py/_check_disk_layout_unchanged