I don't think this is the gotcha you think it is...

I imagine this is before and after- not just after.

As in, they aren't just making lines long and removing whitespace (something models love to do when you ask it to remove lines of code)

Yep, you're right, I read this too fast - it's also breaking long lines into many and I read this in reverse. I just imagined how much I could reduce my own LOC by adjusting the print width on my prettier settings..