Fix now playing output showing empty brackets when no difficulty specified
Fix now playing output showing empty brackets when no difficulty specified

smoogipoo/osu,smoogipoo/osu,ppy/osu,smoogipoo/osu,ppy/osu,peppy/osu,peppy/osu,UselessToucan/osu,NeoAdonis/osu,NeoAdonis/osu,UselessToucan/osu,NeoAdonis/osu,ppy/osu,peppy/osu,UselessToucan/osu,smoogipooo/osu,peppy/osu-new