some pytest on math folder (#1405)

* some pytest on math folder

* Run the test function via a doctest

Also format the code with psf/black as discussed in CONTRIBUTING.md

* Update abs.py

* Update average_mean.py

moita69 committed 6y ago

f93cce66a634746839a78624af4d7b8aab205808

Parent: 67aa3cf

Committed by Christian Clauss <[email protected]> on 10/21/2019, 8:36:33 PM