[issue37661] venv activation scripts erroneously check if __VENV_PROMPT__ is defined

[mental]

Change by mental <m3nta1 at yahoo.com>:


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keywords: +patch
pull_requests: +14703
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/14932

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37661>
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