Love it when my coworkers reformat the code style, making it nigh impossible to understand what they actually changed, while greatly inflating their “contribution.”

It also blows away the git blame, making it hard to know who actually changed that one critical line of business logic 3 years ago that you need to understand before trying to fix some obscure bug.

I have one coworker who does this constantly and if you just looked at git blame, you’d think he wrote the entire code base himself.