Another fairly large but very cosmetic commit. This time I have run flake8 over pypepa/pypepa.py and fixed all the suggestions made
Another fairly large but very cosmetic commit. This time I have run flake8 over pypepa/pypepa.py and fixed all the suggestions made

ageorgou/pepapot,allanderek/pepapot,allanderek/pepapot,ageorgou/pepapot