Why the scare quotes around mistake? Are you implying that it's intentional? Or negligence? It seems like nobody noticed the CUPS license change until now, so it's irrelevant, right?
How is it not intentional? To me it seems very clear that someone designed this bot to specifically alter the LICENSE file so that it matches some sort of predefind Microsoft file.
Edit: To give a bit more nuance, I would guess that the actual bot changing the LICENSE files is not a mistake, but working as intended. What could, however, be a mistake is thinking that licenses can be legally overwritten. It wouldn't be a "rogue engineer" kind of mistake. Certainly several people at Microsoft have signed off on this.
I'm sure it could be used, however that would probably be a similar problem. Microsoft has internal libraries with all sorts of licenses. Replacing the actual licenses with a template wouldn't be the correct move there either.
Because it was done intentionally by an employed individual in this case rather than a bot. You cannot in good conscious as an individual make this "mistake" without knowing or acting maliciously unless you are incompetent to begin with. Seems like a growing trend at MS. And I'll remind you that Apple actually uses CUPS for their print backend and funds it directly, they retain the original license and support the project, meanwhile MS takes it, doesn't contribute and acts like it's their own, sick.
https://github.com/microsoft/cups/commit/ad69bcc78bdea3fea3f...