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
./Maintenance/Maintenance_body.php: $out->addHTML( '<li>' . Linker::link( ./Maintenance/Maintenance_body.php: $out->addHTML( Linker::link( ./Maintenance/Maintenance_body.php: $out->addHTML( Linker::link( ./Maintenance/Maintenance_body.php: Linker::link(