When I have fixed something, I usually comment on the answer to thank the person for reporting it. I don't hide it immediately to give them a chance to see the comment in their updates. I usually hide them a little while after that, maybe a week or two.
I'll continue to do that when I remember, but I'm also perfectly happy for mods to hide answers that have been fixed for several weeks.
P.S. make sure they are fixed though... you edited one about Rockruff to say fixed but it wasn't.