[docs] [issue37353] Source code has not always been forward-compatible

[Prateek Nayak]

Change by Prateek Nayak <lelouch.cpp at gmail.com>:


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keywords: +patch
pull_requests: +14101
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/14277

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37353>
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