repos:
-   repo: https://github.com/psf/black
    rev: 21.5b0
    hooks:
    - id: black
      language_version: python3.7


repos:
-   repo: https://github.com/psf/black
    rev: stable
    hooks:
    - id: black
      language_version: python3.7


Change precommit hook to use stable black.
Change precommit hook to use stable black.
