If you look at this question, my answer is the accepted one because it was the first to be posted, but the most upvoted one is clearly better than mine (and has been consequently upvoted)
What should I do there? AFAIK, only the OP can change the marked answer.
Should I copy the other answer into mine (that doesn't seems right because the poster won't get credit for it).
I don't want to delete my post because it was still a good answer, and I don't want to lose the rep it earned me (although I'm ready to lose the +15 of the accepted answer)