clamp lethal mutations #267

	name: Code formatting

	on:
	pull_request:

	jobs:
	ubuntu:
	name: Ubuntu
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	python: [ "3.12" ]
	os: [ ubuntu-22.04 ]
	defaults:
	run:
	shell: bash
	steps:
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	- name: Cancel Previous Runs
	uses: styfle/cancel-workflow-action@0.12.1
	with:
	access_token: ${{ secrets.GITHUB_TOKEN }}
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: true
	- name: Install black
	run: \|
	python -m pip install black
	- name: Validate code
	run: \|
	find . -name '*.py'\|grep -v headers\|grep -v demes-spec\|xargs python -m black --check

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