I found an edit to a post of mine on the 4th Feb this year.
To be honest, there wasn't anything wrong with the post (other than a cheeky response/salutation, which I've now removed), but the user deemed it necessary to downvote it, edit it and edit the code to include a link to the external file... Fair game, but the resulting snippet didn't work, so I'm trying to figure out the point of the edit - other than the user meeting some form of goal!? I've just rolled it back and largely because, if the snippet doesn't work, then it's an instant negative for anyone visiting the post.
I don't mind anyone editing any question or answer I've ever written, but are there guidelines (anywhere) on ideal snippet-building? In this case it failed miserably IMO.