[issue39048] Change the lookup order of __aenter__ and __aexit__ for async with

[Géry]

Change by Géry <gery.ogam at gmail.com>:


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title: Reorder  __aenter__ & __aexit__ checks for async with statement -> Change the lookup order of __aenter__ and __aexit__ for async with

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39048>
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