* @return array Array with two items: (html, classes)
* - html: String: HTML for displaying the tags (empty string when param $tags is empty)
* - classes: Array of strings: CSS classes used in the generated html, one class for each tag
+ * @return-taint onlysafefor_htmlnoent
*/
public static function formatSummaryRow( $tags, $page, IContextSource $context = null ) {
if ( !$tags ) {