Ensure that absolutized paths from hgrc do not contain ../ segments.
addingabrenamedfroma:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3arenamedfromb:9a263dd772e0159ddfa70fb8a448bb6c7ec8c69f% test with --revbrenamedfroma:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3