Change the separator in between the post tags

functions.php

<?php
// Paste the code BELOW this line into your child theme functions.

/**
 * Change the separator in between the post tags
 *
 * @author Reasons to Use Genesis
 * @link http://reasonstousegenesis.com/list-tags/
 */
add_filter( 'genesis_post_info', 'rtug_tag_list_sep' );
function rtug_tag_list_sep() {
	return '[post_tags sep="! "]';
}