fix l_version function call #507

	name: test creation of the documentation
	on: [push, pull_request]

	jobs:
	test_documentation:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	- name: Set up Python 3.8
	uses: actions/setup-python@v1
	with:
	python-version: 3.8
	- name: install sphinx
	run: pip install sphinx
	- name: Build documentation
	run: \|
	cd docs
	make

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