Post Info code play

//* Customize the post info function
add_filter( 'genesis_post_info', 'sp_post_info_filter' );
function sp_post_info_filter($post_info) {
if ( !is_page() ) {
	$publication-date = types_render_field("pubdate", array("output"=>"html")); //My types custom field
	$authors = types_render_field("authors", array("output"=>"html"));  //author custom taxonomy
	$post_info = '[pubdate] by [authors] [post_comments] [post_edit]';
	return $post_info;
}}