The Events Calendar: Filter iCal Event Item

filter-ical-event-item.php

function filter_ical_description($item, $eventPost) {
	$description = preg_replace( "/[\n\t\r]/", ' ', strip_tags( strip_shortcodes( $eventPost->post_content ) ) );
	$item[] = 'DESCRIPTION:' . str_replace( ',','\,', $description );

	return $item;
}
add_filter('tribe_ical_feed_item','filter_ical_description', 10, 2);