Add missing 'await writer.drain()' call to example (GH-29162)

Sergey Kolesnikov · web-flow · commit e0f8a3e9b96b · 2021-11-25T09:15:24.000-08:00
Automerge-Triggered-By: GH:asvetlov
diff --git a/Doc/library/asyncio-stream.rst b/Doc/library/asyncio-stream.rst
@@ -352,6 +352,7 @@ TCP echo client using the :func:`asyncio.open_connection` function::
 
         print(f'Send: {message!r}')
         writer.write(message.encode())
+        await writer.drain()
 
         data = await reader.read(100)
         print(f'Received: {data.decode()!r}')
