Use black as code formatter

[whot]

Integrated into pyproject.toml and tests/test_code.py so we can enforce the formatting in the CI.

Fixes #187

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Quick! let's do this before someone has an idea of refactoring everything :)

[whot]

For easier review: manual changes in pyproject.toml, tests/test_code.py (to run black) and tests/run-fedora (to install black), rest is whatever black generated though I had to fix a small number of things like b"foo " b"bar" one-liners that for some reason didn't resolve to b"foo bar".

[martinpitt]

Thanks! This looks 95% good, just needs a little manual work for the argparse code.

[martinpitt]

pylint failure:

 dbusmock/templates/networkmanager.py:593:47: W0631: Using possibly undefined loop variable 'ap_path' (undefined-loop-variable)

That's because black broke the line, and the # pylint: disable needs to be on the same line. tools fighting other tools!

[whot]

fixed the pylint error with a follow-up to make it unnecessary

[martinpitt]

Cheers! Assuming green, this looks good. I'll change the max line length for the other tools as a follow-up.

[martinpitt]

Oh, one more black error

[whot]

I'll change the max line length for the other tools as a follow-up.

arguably we should leave them as-is. Black will format the lines to 118 and enforce that, if you leave pylint/ruff on 130 (or remove the line length) then we can format with a trailing # fmt: off without having those two tools complaining about it (happened to me in the earlier 130 version)

Oh, one more black error

gah. fixed now (friday evening here, I probably shouldn't be pushing things :)

[martinpitt]

Cheers! Green 🍀 is the new black! 🏴

[martinpitt]

Now off to enabling black in vim 😁