Fix black / flake8 on all files

[manulera]

We should run black / flake8 across all files so that when we make changes they don't get buried on style changes. Black is automatic, so that's an easy one. flake8 will require work, but it's probably worth.

Alternatively, when making a change if you realise that there will be flake8/black changes, you can create a first commit with black/flake8 fixes, then the actual change.

[manulera]

cc @BjornFJohansson

[BjornFJohansson]

I think this is a good idea. I don't really know how these tools work in detail. Is there perhaps some flake8 (AI) tool that can edit the files automatically? There seems to be something called autopep.

I think it should wait until I have made the changes for the new Dseq implementation.

[manulera]

I think it would be good to do it before the changes, because otherwise reviewing the diffs will be impossible since most changes will be style changes and not actual code changes.