Suppose that hypothetically you downvoted a question because it was wrong or it was off-target or maybe because the asker wrote it in bad barely comprehensible English without seeming to put any effort in it. Suppose then that some moderator comes in to edit the question into actual English and now the question isn't that bad anymore. It's still not worth upvoting, but certainly doesn't deserve a downvote either.
Problem is, if you hit the up arrow to do so, my downvote turns into an upvote. I don't want that!
Is there a way to change your downvote in no vote at all?