Somehow my answer is now marked "community wiki". I'm not sure how this happened; I'm concerned that I accidentally hit a check box or something which caused it to become community wiki, which I certainly didn't intend. It doesn't seem canonical enough to be wiki to me.
If a moderator make it community wiki, it would be nice to have some kind of indication that this was so. If I did it accidentally, it would be nice to be able to undo it.