gh-112155: Run typing.py doctests during tests

[sobolevn]

After this change we can detect some hypothetical problems with doctests in typing.py.
After my change to some incorrect value doctest fails:

» ./python.exe -m test test_typing Using random seed: 3171999375
0:00:00 load avg: 1.44 Run 1 test sequentially
0:00:00 load avg: 1.44 [1/1] test_typing
test test_typing failed -- Traceback (most recent call last):
File "/Users/sobolev/Desktop/cpython2/Lib/doctest.py", line 2267, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for typing.get_protocol_members
File "/Users/sobolev/Desktop/cpython2/Lib/typing.py", line 3398, in get_protocol_members
----------------------------------------------------------------------
File "/Users/sobolev/Desktop/cpython2/Lib/typing.py", line 3407, in typing.get_protocol_members
Failed example:
get_protocol_members(P)
Expected:
frozenset({'a', 'b', 'c'})
Got:
frozenset({'a', 'b'})
test_typing failed (1 failure)
== Tests result: FAILURE ==
1 test failed:
test_typing
Total duration: 253 ms
Total tests: run=601 failures=1 skipped=1
Total test files: run=1/1 failed=1
Result: FAILURE

• Issue: typing.py contains two doctests that are not executed, ever #112155

[AlexWaygood]

Nice, thanks!

[miss-islington-app]

Thanks @sobolevn for the PR, and @AlexWaygood for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @sobolevn and @AlexWaygood, I could not cleanly backport this to 3.12 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 7680da458398c5a08b9c32785b1eeb7b7c0887e4 3.12

[miss-islington-app]

Sorry, @sobolevn and @AlexWaygood, I could not cleanly backport this to 3.11 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 7680da458398c5a08b9c32785b1eeb7b7c0887e4 3.11

[sobolevn]

Will do manual backports later

[AlexWaygood]

Will do manual backports later

I just realised that there are no doctests in Lib/typing.py on the 3.12 or 3.11 branches, so there's no need :)

I'll just remove the "needs backport" labels.

[AlexWaygood]

I just realised that there are no doctests in Lib/typing.py on the 3.12 or 3.11 branches, so there's no need :)

We now do, of course, following the changes made for #112194, so if you're still up for backporting this to 3.12 and 3.11, that would be great :-)

[sobolevn]

Sure!

[bedevere-app]

GH-112230 is a backport of this pull request to the 3.12 branch.

[bedevere-app]

GH-112231 is a backport of this pull request to the 3.11 branch.