Ask HN: Have you ever encountered Doppelgänger-Code?

I have often wondered about if other devs stumble upon code where they really think they would have written it exactly the same way, almost as if it was their own?

Or do you know of a case where some code of different people were exactly alike? To the point that it would seem like plagiarism.

I haven't encountered that. Not even in simple webdev stuff, where there aren't too many ways to do things (excluding some CSS & HTML).

Interested to hear any stories or anecdotes.