How many moderator answers do you want? :)
If it were up to me I'd revert everything: restore the original version of the question and the title and undelete the comment by the OP that said it was a machine without yum.
Reverting the changes doesn't affect the selected answer, so there's no problem there, and undoing them makes it clear what the sequence was: you answered and then the OP added the extra information. In theory, it's better to incorporate the comment into the question, but to me it'd be better to leave it so that it doesn't invalidate your answer.
I'll wait and see what the votes/comments are on my suggestion (and/or the mods can comment in our chat room) before I do anything.