WP Shortcode Display posts and Excerpts in the Text Widget

/*WordPress Shortcode to display the latest 5 posts
 * PLEASE NOTE: This may not work on certain themes or for everyone!
 * Add the following code to your functions.php then add the shortcode [recent-posts] to the text widget
 * box in the WP Dashboard widgets section.  You may need to make changes to your stylesheet's .textwidget or .widget_text classes respectively.
 * Want to display more posts?  Change posts_per_page to the number you wish
 * Want to display Pages? Change post_type to 'pages'
 */
function my_recent_posts($atts){
 $query = new WP_Query( array( 'post_type' =>'post','orderby' => 'date', 'posts_per_page' => '5'));
        $list = '<ul class="recent-posts">';

            while($query->have_posts()) : $query->the_post();

                $list .= '<li><a href="' . get_permalink() . '">' . get_the_title() . '</a>' . '<br />' . get_the_excerpt() . '</li>';

            endwhile;

            wp_reset_postdata();

        return $list . '</ul>';
}
add_filter('widget_text', 'do_shortcode');/*Needed to display shortcode in widget*/
add_shortcode('recent-posts', 'my_recent_posts');
?>