Split migration into two parts #83

	name: Code format check

	on: push

	jobs:
	check:

	runs-on: ubuntu-24.04

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.12

	- name: Install Poetry
	run: \|
	curl -sSL https://install.python-poetry.org \| python3 -

	- name: Install project
	run: \|
	# We only need Black, and we want to use the project-specific version.
	# (Defaults in Black change from time to time and we want only to deal with
	# the consequences, if any, on our own schedule.)
	poetry install --only dev

	- name: Run check
	run: poetry run black . --check

Provide feedback