}
parts = ( separatorMsg + mw.message( 'brackets' ).plain() ).split( '$1' );
- regexp = new RegExp( parts.map( mw.RegExp.escape ).join( '.*?' ) + '$' );
+ regexp = new RegExp( parts.map( mw.util.escapeRegExp ).join( '.*?' ) + '$' );
newTitle = oldTitle.replace( regexp, '' );
accessKeyLabel = getAccessKeyLabel( element );