[issue32924] Python 3.7 docs in docs.p.o points to GitHub's master branch

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


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pull_requests: +24648
pull_request: https://github.com/python/cpython/pull/25995

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<https://bugs.python.org/issue32924>
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