[issue46104] Reduce use of old-style syntax in typing docs

[miss-islington]

miss-islington <mariatta.wijaya+miss-islington at gmail.com> added the comment:


New changeset 0c0bd78ccf8e1eb1d8ecfce423daf2a2f8ca6d3b by Miss Islington (bot) in branch '3.10':
[3.10] bpo-46104: Fix example broken by GH-30148 (GH-30203) (GH-30209)
https://github.com/python/cpython/commit/0c0bd78ccf8e1eb1d8ecfce423daf2a2f8ca6d3b


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<https://bugs.python.org/issue46104>
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