all: Automatic PEP8 fixes

Hi @cevich, there are the promissed PEP8 fixes. It's done by `inspekt style` and `inspekt lint`. There are still lots of remaining warnings/errors/info which needs to be fixed manually. It'd be nice to have `inspekt github` running on each pull request similarly to autotest CI to check this for us. Alternatively the one who merges the changes should run `inspekt` manually and include the fix before he hits the green button.

Regards,
Lukáš