[3.13] gh-142681: Improve unicodedata tests (GH-142682) (GH-142708) (GH-142710)

(cherry picked from commit f6ed94e70edf3250ea7481210d8f536b1448b5c8)
(cherry picked from commit af7cca3c39d59d21073765cbaca3f97e05e6aeec)
2 files changed