test: add test for double included define #428

	name: Lint
	# Make sure only one action triggers the job, otherwise pushing to a
	# pull-request will run it twice.
	on: # yamllint disable-line rule:truthy
	pull_request:
	branches:
	- "*"
	merge_group:

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Install yamllint
	run: sudo apt-get install -y yamllint aspell
	- name: "Clone Repository"
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	- name: Install
	run: \|
	python -m pip install --upgrade pip
	pip install .[dev]
	- name: Run linters
	run: make lint
	- name: Run type checker
	run: make type

Provide feedback