custom placeholder for Recurrence date pattern

<?php
/**
 * The function below adds a placeholder to describe a recurrence pattern, or outputs nothing if event isn't a recurrence.
 * For instructions on how to install this snippet, see here - http://wp-events-plugin.com/tutorials/how-to-safely-add-php-code-to-wordpress/
 *
 * @param string $replace
 * @param EM_Event $EM_Event
 * @param string $result
 * @return string
 */
function my_em_event_recurrences_placeholder($replace, $EM_Event, $result){
    if( $result == '#_EVENTRECURRENCEDATES' ){
        $replace = '';
        if( $EM_Event->is_recurrence() ){
            $replace = $EM_Event->get_recurrence_description();
        }
    }
    return $replace;
}
add_filter('em_event_output_placeholder','my_em_event_recurrences_placeholder',1,3);