## Summary
Now that Ruff provides a formatter, there is no need to rely on Black to
check that the docs are formatted correctly in
`check_docs_formatted.py`. This PR swaps out Black for the Ruff
formatter and updates inconsistencies between the two.
This PR will be a precursor to another PR
([branch](https://github.com/calumy/ruff/tree/format-pyi-in-docs)),
updating the `check_docs_formatted.py` script to check for pyi files,
fixing #11568.
## Test Plan
- CI to check that the docs are formatted correctly using the updated
script.
ab3648c4c5