+* The "free" class is now only applied to unbracketed URLs in wikitext. Links
+ written using square brackets will get the class "text" not "free".
+* OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
+ can use ApiOpenSearch::getOpenSearchTemplate() instead.
+* The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
+ Wikimedia\base_convert() directly.