Line breaks before logical operators

[autophagy]

This addresses #21 where the PEP 8 guidelines state that it's preferred for lines to be broken before a logical operator, rather than afterwards.

However, flake8 yells at me with W503 line break before binary operator, so 😅

[autophagy]

According to beetbox/beets#2687 (comment) W503 ignored by default anyways, but if you define an ignore list yourself it overwrites the defaults, so I've added it back in for this PR.

[ambv]

This is amazing. Thanks a ton! 👍

Since you have a fresh view at this project, can you share what you found surprising, badly commented (incl. docstrings), etc.? We can improve things for future newcomers!

[ambv]

[njsmith]

Sweet, thank you!

[autophagy]

@ambv I actually found the docstrings really well written and helpful, and everything else was pretty intuitive (also everything is named really well, which helps!)

I think the only thing, and this is more of a personal preference, but huge single-file python scripts can be a little intimidating! I dont know if splitting it up into logical components would make much sense, but yeah, with one large python file I find it a little difficult to grasp the structure at a glance 🙂