chore(release): 8.4.0 [skip ci]
# [8.4.0](https://gitlab.com/to-be-continuous/python/compare/8.3.0...8.4.0) (2025-10-31) ### Features * **black:** display diff of reformatted files ([34faae46](https://gitlab.com/to-be-continuous/python/commit/34faae4617b5d9bfc0be0c94da309977114af629))