Add inheritance path

Also fix parsing of [method (Class.)name]

classes/class_mainloop.rst

@@ -5,8 +5,13 @@ MainLoop
 
 **Inherits:** :ref:`Object<class_object>`
 
+**Inherited By:** :ref:`SceneTree<class_scenetree>`
+
 **Category:** Core
 
+Brief Description
+-----------------
+
 Main loop is the abstract main loop base class.
 
 Member Functions