[Async-sig] await question

I was wondering if every use of 'await' should return the control to event loop? So in this example - https://gist.github.com/caulagi/3edea8cf734495f2592528a48f99e1d2 - I was hoping I would see 'A', 'B' to be mixed, but I see only 'A' followed by 'B'. What am I missing? I am using Python 3.7.1. How is my example different from https://docs.python.org/3.7/library/asyncio-task.html#asyncio.run? Thanks.