Small fix to docstring and qt example.

IPython/lib/guisupport.py

@@ -132,6 +132,8 b' def start_event_loop_qt4(app=None):'
     if app is None:
         app = get_app_qt4([''])
     if not is_event_loop_running_qt4(app):
+        from .inputhook import enable_qt4
+        #enable_qt4(app)
         app._in_event_loop = True
         app.exec_()
         app._in_event_loop = False

IPython/lib/inputhook.py

@@ -259,8 +259,8 b' class InputHookManager(object):'
         Parameters
         ----------
         app : toplevel :class:`Tkinter.Tk` widget, optional.
-            Running application to use.  If not given, we probe Qt for an
-            existing application object, and create a new one if none is found.
+            Running toplevel widget to use.  If not given, we probe Tk for an
+            existing one, and create a new one if none is found.
 
         Notes
         -----