doc: add another example use #52

	# This is a basic workflow to help you get started with Actions

	name: CI

	# Controls when the workflow will run
	on:
	# Triggers the workflow on push or pull request events but only for the main branch
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v2

	- name: Run tests
	run: \|
	awk -f riss.awk test.md >tmp.md
	diff tmp.md test_output.md

	- name: Check formatting
	run: \|
	gawk --pretty-print -f riss.awk
	diff awkprof.out riss.awk

	build-macos:
	runs-on: macos-latest
	# Copy of the above
	steps:
	- uses: actions/checkout@v2

	- name: Run tests
	run: \|
	awk -f riss.awk test.md >tmp.md
	diff tmp.md test_output.md

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