Update README.rst

Fix typo

Author: fafhrd91

README.rst

@@ -71,7 +71,7 @@ There is simple usage example::
     def handle(request):
         name = request.match_info.get('name', "Anonymous")
         text = "Hello, " + name
-        return web.Response(body=text.encode('utf-8')
+        return web.Response(body=text.encode('utf-8'))
 
 
     @asyncio.coroutine