[bugstan]

Fixes #160684.

Normalize non-None values in items(vars=...) to strings, matching get(). This fixes integer overrides raising AttributeError and zero/boolean overrides becoming empty strings. Add regression coverage and a NEWS entry.

Validation:

• ./python -m test test_configparser: successful, 396 tests run, 5 skipped.
• make patchcheck and git diff --check: passed.
• The default full suite was not fully green: 459 modules passed, 90 skipped, 9 resource-denied, and 3 failed. The asyncio socket timeout and POP3/TLS errors also reproduced with the original configparser; the complete test_socket module passed on rerun (753 tests, 77 skipped). Six optional extension modules were unavailable in this Linux build.

• Issue: ConfigParser.items() does not normalize non-string vars like get() #160684

[python-cla-bot]

All commit authors signed the Contributor License Agreement.