var $li,
$ul = $createButton.prev( 'ul.mw-htmlform-cloner-ul' ),
html = $ul.data( 'template' ).replace(
- new RegExp( mw.RegExp.escape( $ul.data( 'uniqueId' ) ), 'g' ),
+ new RegExp( mw.util.escapeRegExp( $ul.data( 'uniqueId' ) ), 'g' ),
'clone' + ( ++cloneCounter )
);