Reorder Comment Forms Fields

/*
 * Reorder Comment Forms Fields
 */
function ar_move_comment_field_to_bottom( $fields ) {
	$comment_field = $fields['comment'];
	unset( $fields['comment'] );
	$fields['comment'] = $comment_field;

	return $fields;
}
add_filter( 'comment_form_fields', 'ar_move_comment_field_to_bottom' );