:I am deleting this notice because the edit was part of a series of edits to improve the article. You undid my entire edit so nothing else that is in or out of the article was done by my action. I do see that some edits were made by others after you undid my edit. Go to the history page (View History tab in the article). Click on "prev" next to your last edit. Then you can follow the sequence forward to see if any of the later edits caused a problem.