When the Vagrant role wikidiff2 is enabled, my Vagrant instance gets
Deprecated: Use of $wgExternalDiffEngine = 'wikidiff2' was deprecated in MediaWiki 1.32. [Called from ContentHandler::getSlotDiffRendererInternal in /vagrant/mediawiki/includes/content/ContentHandler.php at line 697] in /vagrant/mediawiki/includes/debug/MWDebug.php on line 309