'Return an unicode string representing the changes'

def _show_change(self, items=None, info=None, cur_artist=u'the    artist', cur_album=u'the    album', dist=0.1):

    items = (items or self.items)
    info = (info or self.info)
    mapping = dict(zip(items, info.tracks))
    config['ui']['color'] = False
    album_dist = distance(items, info, mapping)
    album_dist._penalties = {'album': [dist]}
    commands.show_change(cur_artist, cur_album, autotag.AlbumMatch(album_dist, info, mapping, set(), set()))
    return util.text_string(self.io.getoutput().lower())
