wp-relative-date plugin fix Twenty Eleven

/*
* 'posted ... ago' fix, Twenty Eleven, fix for http://wordpress.org/extend/plugins/wp-relative-date/
*/
function twentyeleven_posted_on() {
    printf( __( '<span class="sep">Posted '.(function_exists('get_relative_date')?'':'on').' </span><a href="%1$s" title="%2$s" rel="bookmark"><time class="entry-date" datetime="%3$s" pubdate>%4$s</time></a>'.(function_exists('get_relative_date')?' ago':'').'<span class="by-author"> <span class="sep"> by </span> <span class="author vcard"><a class="url fn n" href="%5$s" title="%6$s" rel="author">%7$s</a></span></span>', 'twentyeleven' ),
        esc_url( get_permalink() ),
        esc_attr( get_the_time() ),
        esc_attr( get_the_date( 'c' ) ),
        esc_html( (function_exists('get_relative_date')?get_relative_date():get_the_date()) ),
        esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
        esc_attr( sprintf( __( 'View all posts by %s', 'twentyeleven' ), get_the_author() ) ),
        get_the_author()
    );
}