Add impl description for I_ARMI_BP_TO_DB and reformat the docstring #69

	name: ARMI unit tests

	on:
	push:
	paths-ignore:
	- 'doc/**'
	pull_request:
	paths-ignore:
	- 'doc/**'

	jobs:
	build:

	runs-on: ubuntu-22.04
	strategy:
	matrix:
	python: [3.7, 3.8, 3.9, '3.10', '3.11']

	steps:
	- uses: actions/checkout@v2
	- name: Setup Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python }}
	- name: Update package index
	run: sudo apt-get update
	- name: Install mpi libs
	run: sudo apt-get -y install libopenmpi-dev
	- name: Install Tox and any other packages
	run: pip install tox
	- name: Run Tox
	run: tox -e test,mpitest

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