typo

Linking-ScreenManager-to-a-different-Widget.md

@@ -10,7 +10,7 @@ The idea of this snippet is to control the ScreenManager from a different widget
 * *Store a screen name in every Tab*
 * *Ask ScreenManager to change the Screen in TabbedPanels `switch_to` method.*
 
-```
+```
 #!python
 from kivy.app import App
 from kivy.uix.tabbedpanel import TabbedPanel
@@ -53,7 +53,7 @@ Builder.load_string('''
 
 class RootWidget(TabbedPanel):
 
-    mnager = ObjectProperty(None)
+    manager = ObjectProperty(None)
 
     def switch_to(self, header):
         # set the Screen manager to load  the appropriate screen