Update Black (2025 style)

[notatallshaw]

Every year Black updates their style format, the first version containing their 2025 style has just been released.

Pip appears to be affected by 3 changes to the style:

1. fix: additional newline added to docstring when the previous line length is less than the line length limit minus 1 psf/black#4185
2. fix: Consistently add trailing comma on typed parameters psf/black#4164
3. Format hex code in unicode escape sequences in string literals psf/black#2916

[ichard26]

LGTM. It's neat to see the changes I approved years ago finally reach the stable style.

I'll note that we should probably add this commit to the .git-blame-ignore-revs file, but I'll do that before merging. I'll leave this open for objections for the time being.

[ichard26]

I squashed all of the commits to a single one and then added it to .git-blame-ignore-revs. It does dawn on me that the .pre-commit-config.yaml changes shouldn't be ignored, but it's not a huge deal. It'll get overwritten once the next release of Black comes out anyway.

[sbidoul]

@ichard26 if possible please don't merge until 25.0.1 is out (no big deal with this one, though).

[notatallshaw]

Yeah, I'd specifically avoided merging while 25.0 release is still open.

[ichard26]

Sorry about that! I understood the keeping main quiet as avoid merging any feature/bugfix/user-facing changes. I get that any change can destabilize the bugfix release, I'll avoid merging anything until after 25.0.1 👍

[sbidoul]

No worries, this one looks really harmless, and the option to cherry pick is still there in any case.