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Make README badges visually consistent #3

	name: CI

	on:
	push:
	branches: [master]
	pull_request:
	workflow_dispatch:

	permissions:
	contents: read

	concurrency:
	group: ci-${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	tests:
	runs-on: ubuntu-latest
	timeout-minutes: 15
	strategy:
	fail-fast: false
	matrix:
	include:
	- python: '2.7'
	image: python:2.7.18-buster
	- python: '3.5'
	image: python:3.5.10-buster
	- python: '3.6'
	image: python:3.6.15-buster
	steps:
	- uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
	- name: Test supported Python runtime with 100% coverage
	env:
	PYTHON_IMAGE: ${{ matrix.image }}
	run: \|
	docker run --rm \
	-v "$PWD:$PWD" -w "$PWD" \
	"$PYTHON_IMAGE" sh -ec '
	python -m pip install \
	pytest==4.6.11 pytest-cov==2.12.1 coverage==5.5 \
	pep8==1.7.1 mock==3.0.5
	python -m pytest tests formatter2 --cov-report=xml:coverage.xml
	'
	- name: Upload master coverage to Coveralls
	if: matrix.python == '3.6' && github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
	uses: coverallsapp/github-action@8d6379e14d29928660c4ba802d8e85393440b329 # v2.3.8
	with:
	file: coverage.xml
	format: cobertura