handler: docstring fix

tsnoam · tsnoam · commit 856f4460fccb · 2016-04-26T17:47:37.000+03:00
diff --git a/telegram/ext/handler.py b/telegram/ext/handler.py
@@ -46,6 +46,9 @@ def checkUpdate(self, update):
 
         Args:
             update (object): The update to be tested
+
+        Returns:
+            bool
         """
         raise NotImplementedError
 
