[docs] [issue37216] mac installation document wrong for python 3.7.3

[Ned Deily]

Ned Deily <nad at python.org> added the comment:


New changeset fe5f8b9ce2e504d4510cc82129d595015d239634 by Ned Deily (Makdon) in branch '3.8':
[3.8] bpo-37216: Fix version and filename in Mac using document (GH-13964)
https://github.com/python/cpython/commit/fe5f8b9ce2e504d4510cc82129d595015d239634


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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37216>
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