This edit says Edited Tags but it does not show any changes

Question

https://stackoverflow.com/posts/214741/revisions

Answer 1

To my surprise this was my edit, so I can actually explain what happened here. I retagged the question from stackoverflow to stack-overflow, as in general stackoverflow means "questions about the SO site" (questions usually migrated here to meta), and stack-overflow means "questions about stack overflow exceptions". Some time later, these two tags were made synonyms of each other, so now the edit history appears to show no change at all.