fix enum and backslash warnings (GH-25861) (GH-25871)

- Enum warning in test_faulthandler
- backslash warning in test_ipaddress
(cherry picked from commit 652bcd9f9cd2ed89b5fa958f8456556aa43b48cc)

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>
2 files changed