text_encoding() is missing from io.__all__

[ntessore]

Bug report

Bug description:

The public io.text_encoding() function is missing from io.__all__.

>>> import io
>>> "text_encoding" in io.__all___
False

CPython versions tested on:

3.10, 3.11, 3.12

Operating systems tested on:

macOS

Linked PRs

• gh-111356: Add missing documented objects to io.__all__ #111370
• [3.12] gh-111356: io: Add missing documented objects to io.__all__ (GH-111370) #111935
• [3.11] gh-111356: io: Add missing documented objects to io.__all__ (GH-111370) #111936

[AlexWaygood]

The function was added in #19481, by @methane. It looks to me like this was just an accidental omission, rather than something that's been deliberately excluded from __all__. Want to make a PR to add it? :)

Possibly we could also add a test to Lib/test/test_io.py similar to this one, so that we assert that all public module members are included in __all__:

cpython/Lib/test/test_inspect/test_inspect.py

Lines 125 to 126 in b0699aa

	def test__all__(self):
	support.check__all__(self, inspect, not_exported=("modulesbyfile",))

[hugovk]

Fixed and backported, thanks for the issue!