When going through the edit queue, I saw 2 edit suggestions which included un-necessary edits.
The interesting thing is that these un-necessary edits weren't there to actually edit the post. they're there to get around arbitrary blockades that SO sets up.
One to allow someone to undo their apparently incorrect downvote
If you want to prevent tactical downvoting, than you don't have to refund the voter's reputation if he decides to remove his downvote but would otherwise be blocked.
and one to dance around the 6 char edit limit.
Some of the most common and most crucial mistakes that new(and sometimes even not so new) users make is not formatting code blocks. This problem can normally be fixed 100% by white-space. and when you encourage users to hunt for other things to change, you get results like in the example.