Docs

Fix missing docstring for low-k example #331

	name: Docs
	on: push
	env:
	PYTHON_VERSION: '3.13'
	jobs:
	docs:
	runs-on: ubuntu-latest
	timeout-minutes: 25
	steps:
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ env.PYTHON_VERSION }}
	- name: Print Python version
	run: python -V
	- name: Install LaTeX
	run: \|
	sudo apt-get update
	sudo apt-get install -y cm-super dvipng fontconfig latexmk optipng texlive-latex-extra texlive-xetex fonts-freefont-otf xindy
	- name: Checkout
	uses: actions/checkout@v4
	- name: Load pip cache
	uses: actions/cache@v4
	with:
	path: .pip
	key: pip-${{ runner.os }}-${{ hashFiles('requirements.txt') }}
	restore-keys: \|
	pip-${{ runner.os }}-
	pip-
	- name: Install requirements
	run: \|
	pip --cache-dir=.pip install --upgrade pip wheel
	pip --cache-dir=.pip install -r requirements.txt -r requirements-dev.txt -r docs/requirements.txt
	- name: Generate reference data
	run: python3 pttools/bubble/fluid_reference.py
	env:
	PYTHONPATH: .
	- name: Generate documentation
	run: \|
	cd docs
	make all
	- name: Upload results
	uses: actions/upload-artifact@v4
	with:
	name: Documentation
	path: \|
	docs/_build
	if-no-files-found: error

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