Fixing a word usage issue in docs.

Signed-off-by: Armin Ronacher <[email protected]>

Author: Sean Reifschneider

flask/app.py

@@ -715,7 +715,7 @@ def handle_http_exception(self, e):
 
     def handle_exception(self, e):
         """Default exception handling that kicks in when an exception
-        occours that is not catched.  In debug mode the exception will
+        occours that is not caught.  In debug mode the exception will
         be re-raised immediately, otherwise it is logged and the handler
         for a 500 internal server error is used.  If no such handler
         exists, a default 500 internal server error message is displayed.