Enabling black progressively.

[gabrieldemarmiesse]

With this method, we have a big todo list and we can start formatting files with black when there are no pull requests pending and working on those files.

Hooo boy this pull request was painful. Lesson learned, pre-commit and customization don't play well together.

I removed the exception for dotted files in the gitignore because it didn't work to just write:

\!.pyproject.toml

[seanpmorgan]

So at some point I would like to have this down to a single check. Once the rather large black reformatting is complete do you see a need for flake8? I believe as a subset of pep8 we should be fine (minus the line length)

[gabrieldemarmiesse]

Flake8 is an addition of multiple tools. If we enforce black, then we should disable pycodestyle. See http://flake8.pycqa.org/en/latest/user/error-codes.html

I'd preferto use flake8 with pycodestyle disabled. We get useful checks and we can add plugins to flake8 in the future.

I'll disable pycodestyle in another pull request if you don't mind :)

If we want one single check, I can look into how to put everything in a bash script/docker command/pre-commit hook.

[seanpmorgan]

LGTM! We can start formatting our code with some care to not stomp on on-going pull requests

[seanpmorgan]

I think it's okay to allow hidden files. If we see this as an issue we can revisit. It was a larger issue before when we were planning on doc files living within the repo that were auto generated.