$revisions_sidebar .= '<p>' . __( '<a href="https://wordpress.org/support/" target="_blank">Support Forums</a>' ) . '</p>';
get_current_screen()->set_help_sidebar( $revisions_sidebar );
$revisions_sidebar .= '<p>' . __( '<a href="https://wordpress.org/support/" target="_blank">Support Forums</a>' ) . '</p>';
get_current_screen()->set_help_sidebar( $revisions_sidebar );