flax

7bcd502f - Add .style.yapf config that matches the Google internal style guide.

Add .style.yapf config that matches the Google internal style guide. Unfortunately the Google internal formating is different from PEP8 (column limit 79 -> 80 and indent width 4 -> 2, a few things around when and how to split lines). YAPFs own style matches this. YAPF will automatically pick up the config when run anywhere inside the repository.