fix missing : in documentation example (miguelgrinberg#386)

Rotzbua · miguelgrinberg · commit d4b403431152 · 2019-11-26T18:29:30.000Z
diff --git a/docs/client.rst b/docs/client.rst
@@ -268,7 +268,7 @@ Or in the ``asyncio`` version::
 For the convenience of the application, a helper function is provided to
 start a custom background task::
 
-    def my_background_task(my_argument)
+    def my_background_task(my_argument):
         # do some background work here!
         pass
 
@@ -279,7 +279,7 @@ positional or keyword arguments to invoke the function with.
 
 Here is the ``asyncio`` version::
 
-    async def my_background_task(my_argument)
+    async def my_background_task(my_argument):
         # do some background work here!
         pass
 
