I don't know much about AI, but I think one reason you might do that is to learn which variations are preferred (which are committed unmodified) so you can tune

I don't know much about AI, but I think one reason you might do that is to learn which variations are preferred (which are committed unmodified) so you can tune the model in the future. I don't know if Github does that, but given they've cited how often code from copilot is committed without modification, I assume they are measuring it at least in some cases.