[jlc]

Typically, it isn't digging. It's the last commit, maybe the one before it, and I have tools for doing this (e.g., magit, fugitive).

I don't notify anyone, nor do I need to. When I encounter a WTF moment, I look at the commit messages. When there's nothing there, I curse the last developer.

I guess it can be fun spelunking through commit messages, though, to see when the comment was added and if it still applies.