bpo-40275: Use new test.support helper submodules in tests by shihai1991 · Pull Request #21317 · python/cpython

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vstinner

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PyUnicode_EncodeDecimal and PyUnicode_TransformDecimalToASCII
are deprecated since Python 3.3.
But Py_DEPRECATED(3.3) was commented out.
It doesn't use PyUnicode_EncodeDecimal. It uses a private API instead.

@ZackerySpytz @shihai1991

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@pablogsal @shihai1991

* Clarify number of scopes

* Indicate 3 or 4

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
…21340)

* improve control flow docs

* Add also

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

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