Validate all snapshots pass PEP8

[azz]

Could shell out to run https://pypi.python.org/pypi/pep8 on the stdin stream?

[taion]

it’s pycodestyle now

y’all should talk to the @pycqa folks, especially @sigmavirus24

[sigmavirus24]

@taion, please don't @-mention me unless it's required. I have far too many notifications to be subscribed to issues on which I have nothing to do. I don't appreciate being forcibly subscribed to things.

[taion]

My bad. I see your name a lot on the Python code quality repos, so I thought you might find this interesting. Prettier has been a massive game changer in the JS ecosystem in ways that autopep8 and yapf have not been for Python.