[multiprocessing] minor pylint pleasing
[multiprocessing] minor pylint pleasing

moyogo/fontbakery,googlefonts/fontbakery,googlefonts/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery,graphicore/fontbakery