Update app.py

app.py

@@ -51,7 +51,7 @@ def generate_invoice(customer_name, table_number, selected_items, wishes):
         for wish in wishes.split(','):
             invoice += f\"- {wish.strip()}\\n\"
 
-        invoice += \"\"\"\n
+        invoice += """
         -----------------------------------------
         Thank you for dining with us!
         Have a great day!