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
/includes/NostalgiaTemplate.php:
$s .= $sep . Linker::link( $user->getUserPage(), $skin->msg( 'mypage' )->escaped() ); $s .= $sep . Linker::link( $user->getTalkPage(), $skin->msg( 'mytalk' )->escaped() ); $s .= $sep . Linker::link( $s[] .= Linker::linkKnown( $tl = Linker::linkKnown( $dl = Linker::linkKnown( $s = Linker::linkKnown( $s = Linker::linkKnown( $s = Linker::linkKnown( $s = Linker::linkKnown( return Linker::linkKnown( return Linker::link( return Linker::linkKnown( return Linker::linkKnown( return Linker::linkKnown( return Linker::linkKnown( $s = Linker::link( $link, $text->escaped(), [], [], $linkOptions ); return Linker::linkKnown(