Last modified: 2013-08-01 12:18:56 UTC
Special:ManageMessageGroups shows "(No difference)". This does not make sense here. I guess this is related to core change https://gerrit.wikimedia.org/r/#/c/73014/
Created attachment 13021 [details] Screenshot
DifferenceEngine::getDiff will give the complete diff table, setting the text to empty string results in a empty diff. To get the header only, you should use DifferenceEngine::addHeader direct.
Change 77092 had a related patch set uploaded by Nikerabbit: Use better method to add header https://gerrit.wikimedia.org/r/77092
Change 77092 merged by jenkins-bot: Use better method to add header https://gerrit.wikimedia.org/r/77092