Change the WordPress excerpt more string

excerpt.php

<?php
/**
 * Change the excerpt more string.
 *
 * @since  1.0.0
 * @param  string  $more
 * @return string
 */
function prefix_excerpt_more( $more ) {
	return '&hellip;';
}
add_filter( 'excerpt_more', 'prefix_excerpt_more' );