Clarify the meaning of instancing diagram arrows in Creating instances #13820

	name: Continuous integration

	on:
	push:
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref_name }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-24.04
	timeout-minutes: 120
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Style checks via pre-commit
	uses: pre-commit/action@v3.0.1

	- name: Get Python version
	id: pythonv
	run: \|
	echo "PYTHON_VERSION=$(python --version)" >> $GITHUB_OUTPUT

	- name: Restore cached virtualenv
	uses: actions/cache/restore@v4
	with:
	key: venv-${{ runner.os }}-${{ steps.pythonv.outputs.PYTHON_VERSION }}-${{ hashFiles('requirements.txt') }}
	path: .venv

	- name: Install dependencies
	run: \|
	python -m venv .venv
	source .venv/bin/activate
	python -m pip install -r requirements.txt
	echo "$VIRTUAL_ENV/bin" >> $GITHUB_PATH
	echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> $GITHUB_ENV

	- name: Save virtualenv cache
	uses: actions/cache/save@v4
	with:
	key: venv-${{ runner.os }}-${{ steps.pythonv.outputs.PYTHON_VERSION }}-${{ hashFiles('requirements.txt') }}
	path: .venv

	# Use dummy builder to improve performance as we don't need the generated HTML in this workflow.
	- name: Sphinx build
	run: \|
	source .venv/bin/activate
	make SPHINXOPTS='--color -j 4 -W' dummy

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