Ruff format

[tovrstra]

This pull request takes care of the autoformatting mentioned in #313. I'm using Ruff format instead of Black. Both are very similar, but Ruff format is faster. Because I'd like to use Ruff also for linting (which is insanely fast and extensive) in the following pull request, it seems wise to use the same tool for as many tasks as possible.

This is a big change, but all of it is just formatting. I've excluded a few blocks from the autoformatting. See (# fmt: off and fmt: on) in 11c6203.

I've also upgraded a few other pre-commit tools to more recent versions, but this had any visible effect.

Tests pass on my machine.

[tovrstra]

I'm planning to YOLO-merge this Wednesday, May 22, unless reviewed and approved earlier.

[PaulWAyers]

I'm OK with the switch to ruff. I've had both ruff and black locally for a while and can't see much difference. ruff seems more integrated (closer to one-stop shopping). Disadvantages I see from changing are:

• change is hard.
• ruff is developed by a for-profit company (unlike black)
• even the latest version of ruff (0.4) is still not a version 1.0-type stable release.

It would be annoying to change to ruff and then have to change back because the company died or started charging money. But that is probably a minor concern.

[tovrstra]

I agree that there is not much information on how the company behind Ruff will survive in the long run, but given the popularity of Ruff, it will probably outlive the company and remain available as open source in some form. Upgrading is quite smooth. I've gone through upgrades from pre-0.1 to 0.4 and barely noticed. The usage is more stable than the version numbering suggests.