test.py: replace os.getcwd() with os.path.dirname(__file__) so we can run tests from the root of repo
test.py: replace os.getcwd() with os.path.dirname(__file__) so we can run tests from the root of repo

moyogo/mutatormath,anthrotype/MutatorMath,LettError/MutatorMath,miguelsousa/MutatorMath