usage error; should have been historical instead of historic

docs/userguide/routing.rst

@@ -40,7 +40,7 @@ configuration::
 
 With this route enabled import feed tasks will be routed to the
 `"feeds"` queue, while all other tasks will be routed to the default queue
-(named `"celery"` for historic reasons).
+(named `"celery"` for historical reasons).
 
 Now you can start server `z` to only process the feeds queue like this::