Use '//' for comments

- to be consistent with the rest of the file
- plus SPG fix

Co-authored-by: Adrian Coveney <[email protected]>

htdocs/web_portal/components/Get_User_Principle.php

@@ -227,8 +227,8 @@ function Get_User_Principle_PI() {
         }
     }
 
-    # Returning null here is necessary, because parts of the API are exposed
-    # publically, without authentication.
+    // Returning null here is necessary, because parts of the API are exposed
+    // publicly, without authentication.
     return null;
 }