Update app.py

app.py

@@ -15,6 +15,9 @@ def get_message_repeater(message:str, times:int)-> str: #it's import to specify
     Args:
         arg1: the message to repeat
         arg2: how many times to repeat the message
+
+    Returns:
+        str: The repeated message.
     """
     return (message + " ") * times