Linker::link() and Linker::linkKnown() functions are deprecated as of MediaWiki 1.28, and the new LinkRenderer is preferred instead.
https://doc.wikimedia.org/mediawiki-core/master/php/classLinker.html
./DataTransfer/includes/specials/DT_ViewXML.php: $link = Linker::link( $title, htmlspecialchars( $title->getText() ) );