Holy crap, I just realized. "Of you're." What kind of typo is that?
Anyway patterns are too much for my brain to comprehend tbh, but the end result is that it takes the number and adds comma separator (so 10000 becomes 10,000.)
If you feel like you can understand it you can probably read up on
documentation to figure out exactly what the pattern matches.
Maybe it won't be as useful anymore once they do the next numbers squish, but that's hardly a reason not to make addons for the current game. ;p