Add GridFormat::Cells #218

	name: Black
	on: [push]

	jobs:
	format:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.11
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install isort>=5.10 black>=22.1
	- name: Format
	# Both isort and black have a --check option, but to get the imports sorted and formatted correctly,
	# I need to run isort _and then_ black, _and then_ check for differences.
	run: \|
	find generative/ tests/ tools/ -name '.py' -and -not -path 'geom2graph*' -exec isort {} +
	find generative/ tests/ tools/ -name '.py' -and -not -path 'geom2graph*' -exec black --line-length 100 {} +
	git diff --exit-code

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