add logging for when testing is already running and causes new runs to be canceled #9829

	name: PR files

	on:
	pull_request:
	types:
	# On by default if you specify no types.
	- 'opened'
	- 'reopened'
	- 'synchronize'
	# For `skip-label` only.
	- 'labeled'
	- 'unlabeled'

	jobs:
	changed-files-in-pr:
	name: 'Check for changed files'
	runs-on: ubuntu-latest
	steps:
	- name: 'package-lock.json matches package.json'
	uses: brettcannon/[email protected]
	with:
	prereq-pattern: 'package.json'
	file-pattern: 'package-lock.json'
	skip-label: 'skip package*.json'
	failure-message: '${prereq-pattern} was edited but ${file-pattern} was not (the ${skip-label} label can be used to pass this check)'

	- name: 'package.json matches package-lock.json'
	uses: brettcannon/[email protected]
	with:
	prereq-pattern: 'package-lock.json'
	file-pattern: 'package.json'
	skip-label: 'skip package*.json'
	failure-message: '${prereq-pattern} was edited but ${file-pattern} was not (the ${skip-label} label can be used to pass this check)'

	- name: 'Tests'
	uses: brettcannon/[email protected]
	with:
	prereq-pattern: src/*/.ts
	file-pattern: \|
	src/*/.test.ts
	src/*/.testvirtualenvs.ts
	.github/test_plan.md
	skip-label: 'skip tests'
	failure-message: 'TypeScript code was edited without also editing a ${file-pattern} file; see the Testing page in our wiki on testing guidelines (the ${skip-label} label can be used to pass this check)'

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