fix tutorials #84

	# adapted from:
	#
	# * base code: https://peterevans.dev/posts/github-actions-how-to-automate-code-formatting-in-pull-requests/
	# * fix push auth: https://github.com/ad-m/github-push-action
	# * checkout PR head commit https://github.com/actions/checkout#checkout-pull-request-head-commit-instead-of-merge-commit
	name: auto-format
	permissions:
	packages: read
	contents: write
	on:
	pull_request:
	paths:
	- '**.py'
	workflow_dispatch:
	inputs:
	jobs:
	format:
	# Check if the PR is not from a fork
	if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.ref }}
	- name: format
	shell: bash
	run: \|
	pip install isort ruff black
	isort . //*.py
	black . //*.py
	ruff check --fix . //*.py

	- name: Check for modified files
	id: git-check
	run: echo ::set-output name=modified::$(if git diff-index --ignore-submodules --quiet HEAD --; then echo "false"; else echo "true"; fi)

	- name: Commit changes, if any
	if: steps.git-check.outputs.modified == 'true'
	run: \|
	git config --local user.email "github-actions[bot]@users.noreply.github.com"
	git config --local user.name "github-actions[bot]"
	git remote set-url origin https://${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
	git fetch origin
	git commit -am "LOOK ON MY REFORMAT, YE MIGHTY, AND DESPAIR!"
	git push origin ${{github.event.pull_request.head.ref }}

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