CI Linux: Run `ubuntu-focal-standard` without waiting for other platforms #5660

	name: Lint

	on:
	push:
	branches:
	- master
	- develop
	pull_request:
	merge_group:

	concurrency:
	# Cancel previous runs of this workflow for the same branch
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	lint-pycodestyle:
	name: Code style check with pycodestyle
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Merge CI fixes from sagemath/sage
	run: \|
	.ci/merge-fixes.sh
	env:
	GH_TOKEN: ${{ github.token }}
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.9
	- name: Install pycodestyle
	run: pip install tox pycodestyle
	- name: Lint using pycodestyle
	run: tox -e pycodestyle-minimal
	lint-relint:
	name: Code style check with relint
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Merge CI fixes from sagemath/sage
	run: \|
	.ci/merge-fixes.sh
	env:
	GH_TOKEN: ${{ github.token }}
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.9
	- name: Install relint
	run: pip install tox relint
	- name: Lint using relint
	run: tox -e relint -- src/sage/
	lint-rst:
	name: Validate docstring markup as RST
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Merge CI fixes from sagemath/sage
	run: \|
	.ci/merge-fixes.sh
	env:
	GH_TOKEN: ${{ github.token }}
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.9
	- name: Install tox
	run: pip install tox
	- name: Lint using tox -e rst
	run: tox -e rst

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