Add stickler and black config files

[uvchik]

Fixes #81 .

Test stickler-ci for the windpowerlib.

[vezeli]

@uvchik If this gets merged and the contributors are supposed to run Black before submitting a PR than adding information in "Contributing" reflecting this should be needed? Also adding it now seems OK.

[uvchik]

If it works as intended you do not have to run Black before submitting a PR. At the moment you have to follow the pep rules anyway. Stickler-ci will check that and Black may fix it automatically but at the moment it does not seem to work. Maybe I have to merge it to get it work.

[vezeli]

Oh nice, that is actually a really neat service to have! When you get it working I found some information here and here that accounts for the incompatibility between flake8 and black and makes them work together better.

[uvchik]

Now it works. According to @gnn the black style might not be "everybody's darling" but is well documented and every decision is explained in the black documentation. I personally do not like everything but as it makes things easier I would vote for using it.

[SabineHaas]

Thanks for implementing this @uvchik!
I have to admit that I don't like the open brackets being moved to the next line.. Is there any way to change settings?

Anyways, I really appreciate that we then have a consistent style (no matter the brackets ;))
:)

[uvchik]

I have to admit that I don't like the open brackets being moved to the next line.. Is there any way to change settings?

I do not like them either 😏

But I would not change it, because of two reasons.

1. If you start with exceptions you could discuss any style element. Why not use 100 instead of 80 characters and so on. To avoid such discussions I would use the full package without exceptions (de gustibus non est disputandum).

2. Black really explains everything. In this case it is used to make diff-files easier to read (->https://black.readthedocs.io/en/stable/the_black_code_style.html#how-black-wraps-lines)

I would like both of you (@birgits, @SabineHaas) to approve this issue. @vezeli already reacted with the 👍 emoji.

[SabineHaas]

Great! Thanks a lot :)

[birgits]

Thanks @uvchik for implementing this!