Choose a consistent coding style

[stijn-uva]

As more developers are contributing to 4CAT, the chance of mixing up different code styles increases and this can be inconvenient or confusing.

I propose we adopt Black for 4CAT, and then we don't have to worry about this anymore :-)

[sal-uva]

I'll have to say goodbye to my beloved tabs but sounds like a good idea 👍

[dale-wahl]

It sounds nice to have that handled for us to some degree. I'm curious to see how it works in practice. I'll read up on Black.

[dale-wahl]

Black is beautiful.

Have you run it on 4CAT? You should and just see all the lovely formatted functions and loops and returns. The number of diffs is a little bit of a slap on the wrist to our own styles but, hey, it's to be expected. I'd miss tabs, but all my IDEs convert my tabs to spaces anyway.

I built a docker version off it and nothing crashed (that's my base level of testing/approval).