Fixed typos

sanic/exceptions.py

@@ -33,7 +33,7 @@ class Handler:
 
     def response(self, request, exception):
         """
-        Fetches and executes an exception handler and returns a reponse object
+        Fetches and executes an exception handler and returns a response object
         :param request: Request
         :param exception: Exception to handle
         :return: Response object