lint

doc/tutorial-asyncio.rst

@@ -455,7 +455,7 @@ to an :class:`aiohttp.web.Application`:
   :end-before: main-end
 
 .. warning::
-   It is a common mistake to create a new client object for every request; this comes at a dire performance cost. 
+   It is a common mistake to create a new client object for every request; this comes at a dire performance cost.
    Create the client when your application starts and reuse that one client for the lifetime of the process.
    You can maintain the client by storing a database handle from the client on your application object, as shown in this example.