Enable ruff's `flake8-commas` rule

[CoolCat467]

In this pull request, we enable ruff's flake8-commas rule and handle all the reformatting black does because of this.

~No functional changes~ Had to update gen_exports to run black a 2nd time, if/when this is merged it will probably need to be added to the purely formatting commits thing jakkdl was talking about a while ago.