Run markdownlint on all md files, ignore vendor for metrics, remove badges when converting to HTML #335

	name: tox
	on: # yamllint disable-line rule:truthy
	- pull_request
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	jobs:
	python:
	strategy:
	matrix:
	pyver_os:
	- ver: '2.7'
	os: ubuntu-20.04
	- ver: '3.6'
	os: ubuntu-20.04
	- ver: '3.8'
	os: ubuntu-latest
	- ver: '3.9'
	os: ubuntu-latest
	- ver: '3.10'
	os: ubuntu-latest
	- ver: '3.11'
	os: ubuntu-latest
	runs-on: ${{ matrix.pyver_os.os }}
	steps:
	- name: checkout PR
	uses: actions/checkout@v3
	- name: Set up Python 2.7
	if: ${{ matrix.pyver_os.ver == '2.7' }}
	run: \|
	set -euxo pipefail
	sudo apt update
	sudo apt install -y python2.7
	- name: Set up Python 3
	if: ${{ matrix.pyver_os.ver != '2.7' }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.pyver_os.ver }}
	- name: Install platform dependencies, python, tox
	run: \|
	set -euxo pipefail
	python -m pip install --upgrade pip
	pip install -rtox-requirements.txt
	- name: Run tox tests
	run: \|
	set -euxo pipefail
	toxpyver=$(echo "${{ matrix.pyver_os.ver }}" \| tr -d .)
	case "$toxpyver" in
	-alpha\|-beta) toxpyver=$(echo "$toxpyver" \| sed 's/^.* $[1-9][0-9]*$$/\1/') ;;
	27) export SAFETY_CMD="echo skipping safety" ;;
	esac
	toxpyenv="py${toxpyver}-tox30"
	# run linters only on ubuntu-latest
	if test X${{ matrix.pyver_os.os }} = Xubuntu-latest; then
	linters="black,isort,pylint,flake8,mypy,bandit,pydocstyle,"
	fi
	# run python unit tests only on the toxenv that matches the
	# current system version of python
	tox -e "${linters:-}$toxpyenv,coveralls"

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