[issue34335] Fix examples in asyncio docs (suppliment to bpo-32258)

[Mikhail Terekhov]

Change by Mikhail Terekhov <termim at gmail.com>:


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keywords: +patch
pull_requests: +8167
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34335>
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