gh-36476: Fix bootstrapping on `centos-7`, `fedora-30`, `ubuntu-xenial` #23

	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:
	name: Lint
	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 dependencies
	run: pip install tox pycodestyle relint

	- name: Code style check with pycodestyle
	run: tox -e pycodestyle-minimal

	- name: Code style check with relint
	run: tox -e relint -- src/sage/

	- name: Validate docstring markup as RST
	run: tox -e rst

Provide feedback