Minor - format code

- Replaced 'Security :: remove_XSS' to 'Security::remove_XSS'
- Replaced 'unset ()' to 'unset()'

main/inc/lib/api.lib.php

@@ -2816,7 +2816,8 @@ function api_is_session_in_category($session_id, $category_name)
  *                               'subTitle'
  * @return void
  */
-function api_display_tool_title($title_element) {
+function api_display_tool_title($title_element)
+{
     if (is_string($title_element)) {
         $tit = $title_element;
         unset($title_element);