User blog comment:Salrith/Anti Griefing.../@comment-4038658-20110621020151

Another shortcut-ed way, especially if you found it early (via the recent wiki activity feed), is just click the 'piece of paper with a magnifying glass' icon that, when moused over, reads: 'show me the change on this page'. From there it will show the previous page as well as the current one with the edited parts in red. Then just click 'undo'. This is my preferred method and I really REALLY hope I used proper punctuation on my first sentence, due to the fact it was rather complicated.