Python lint: Replace flake8 with ruff

[cclauss]

https://docs.astral.sh/ruff is an extremely fast Python linter and code formatter, written in Rust. With over 800 linting rules, ruff can be used to replace Flake8 (plus dozens of plugins), Black, isort, pydocstyle, pyupgrade, autoflake, and more, all while executing tens or hundreds of times faster than any individual tool.

[ftnext]

If you are starting a completely new project, Ruff is a strong candidate.
However, for a project with history like SpeechRecognition, I think it is important to pay attention to the history.
ruff check itself is not fully compatible with flake8, so I don't see any reason why Ruff should be adopted in this project at the moment.

[cclauss]

Based on the ruff docs, ruff is a complete superset of flake8.

[ ... ] designed as a drop-in replacement for Flake8 (plus dozens of plugins), isort, pydocstyle, pyupgrade, autoflake, and more.
-- https://docs.astral.sh/ruff/linter

By default, Ruff enables Flake8's F rules, along with a subset of the E rules, omitting any stylistic rules that overlap with the use of a formatter, like ruff format or Black.
-- https://docs.astral.sh/ruff/rules

[ftnext]

ruff is a complete superset of flake8.

No.
example: astral-sh/ruff#4125 (comment)
See https://docs.astral.sh/ruff/rules/#warning-w (No W503, W504)

[cclauss]

Yes. Those are autocorrected by Black or Ruff Format as discussed above.