Fix buggy key check. #693

	name: Check formatting of source code

	on:
	push:
	branches: [master, main]
	pull_request:
	types: [synchronize, opened]

	jobs:
	ruff:
	strategy:
	matrix:
	ruff_args: ["format --diff", "check"]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: 3.11
	- name: Install packages
	run: \|
	python -m pip install --upgrade pip
	pip install --user ruff==0.6.9
	- name: Check formatting
	run: \|
	ruff ${{ matrix.ruff_args }}
	- name: Inform about how to fix failure
	if: failure()
	run: \|
	echo '::notice::To auto-fix the formatting error, run `make format`'
	prettier:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with:
	node-version: 18.x
	cache: "npm"
	- name: Install packages
	run: \|
	npm ci
	- name: Check formatting
	run: \|
	npx prettier --check .
	- name: Inform about how to fix failure
	if: failure()
	run: \|
	echo '::notice::To auto-fix the formatting error, run `make format`'

Provide feedback