Fix: check_order_number function on empty files #472

	---
	name: Lint and format everything
	on: # yamllint disable-line rule:truthy
	push:
	branches:
	- main
	pull_request:
	jobs:
	markdownlint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Setup NodeJS
	uses: actions/setup-node@v4
	- name: Install markdownlint
	run: npm install -g markdownlint-cli
	- name: Run markdownlint
	run: markdownlint "*/.md"
	ruff:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Check code with ruff
	uses: chartboost/ruff-action@v1
	with:
	version: 0.5.6
	args: check
	src: "."
	deadcode:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"
	- name: Install deadcode
	run: pip install deadcode
	- name: Run deadcode
	run: deadcode .

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