extract inner function #220

	name: Build document

	on: [push, pull_request]

	permissions:
	contents: read

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3
	- name: Install dependencies
	run: \|
	sudo apt update
	sudo apt install -y graphviz
	python -m pip install --upgrade pip
	python -m pip install .[docs]
	- name: Render the documentation
	run: >
	python
	-X dev
	-X warn_default_encoding
	-m sphinx
	-M html ./doc ./build/sphinx
	-W
	--keep-going

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