[issue37028] Implement asyncio repl

[Yury Selivanov]

Yury Selivanov <yselivanov at gmail.com> added the comment:

> I suggest "Python asyncio REPL 3.8.0a4+ (...)". I prefer to keep "Python" somewhere.

Sure.

> Is "exiting asyncio REPL..." message really helpful? If exit can block, would it possible to only display a message if something "hangs" (takes time)? I would expect something like "Waiting for xxx completion for 1 second...".

NP, I can drop the message.  The waiting part isn't necessary, since we don't try to shutdown the loop properly anyways (yet)

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37028>
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