Autoformat. My boss hates it when I use it, he tells me if I do it again I'll get some pain. Namely because autoformat mixed in with code changes is ugly, that's understandable. But he's barred me from using it entirely, although I find it useful when working in Python or CSS... So to circumvent this I make a separate commit with "cleanup", however I sometimes forget to do this... I know I've forgotten, because my boss calls my name from the room next door. I get up, step inside his office and - "Don't use f****** autoformat!". Well FML.