pre-commit-black

Minimal example of Black pre-commit hook failing to respect pyproject.toml exclude rule.

The main branch uses black 20.8b2. The master-black branch uses black's master branch.

To run

1. poetry install
2. poetry shell
3. pre-commit install
4. Add a trailing newline to ignored/ostensibly_ignored.py.
5. Run black check . to verify that project files pass.
6. Stage the change and attempt to commit.