Issue #21058: Fix a leak of file descriptor in tempfile.NamedTemporaryFile(),
close the file descriptor if io.open() fails
Closes #18456: Doc fix: PyDict_Update only works with dict-like objects, not key-value sequences. Patch by priyapappachan.
Issue #21006: asyncio doc: reorganize subprocess doc
Closes #21045: make the Qt help build not look completely stupid
Updated external link in documentation.