gh-37674: some pep8 and ruff cleanups in modules/
some ruff and pep8 cleanup in the `modules` folder
### :memo: Checklist
- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
URL: https://github.com/sagemath/sage/pull/37674
Reported by: Frédéric Chapoton
Reviewer(s): Travis Scrimshaw
