Yeah, it's fairly clever but not actually magical. Sometimes you have to go in and take a look.

Actually, the real magic is that it works out mostly ok most of the time. Much better than older systems where you would have to "check out" a file to work on it which would lock others out. I've heard older programmers talk about needing to go find someone who had a file checked out and have them check it back in to enable them to do some work.