solved merge annotation attribute error in #143 and added test cases #394

	# GitHub Action that uses Black to reformat the Python code in an incoming pull request.
	# If all Python code in the pull request is complient with Black then this Action does nothing.
	# Othewrwise, Black is run and its changes are committed back to the incoming pull request.
	# https://github.com/cclauss/autoblack

	name: autoblack_pull_request
	on: [ pull_request ]
	jobs:
	black-code:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	ref: ${{ github.head_ref }}
	- uses: actions/setup-python@v5
	with:
	python-version: '3.11'
	- run: pip install black
	- run: black --check .
	- name: If needed, commit black changes to the pull request
	if: failure()
	run: \|
	printenv \| grep GITHUB
	git config --global user.name 'PMBio'
	git config --global user.email '[email protected]'
	git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
	git remote -v
	git branch
	git status
	black .
	git status
	echo ready to commit
	git commit -am "fixup! Format Python code with psf/black pull_request"
	echo ready to push
	git push

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