Issue #19648: implement empty tests in pickletester.  Patch by Gennadiy Zlobin.
Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl module, rather than silently let them emit clear text data.
Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl module, rather than silently let them emit clear text data.
Export asyncio.iscoroutine[function].
Issue #19918: Fix PurePath.relative_to() under Windows.
Fix breakage in TestSuite.countTestCases() introduced by issue #11798.
Backporing the fix from Issue #12692
#12692: null merge with 3.3
Add context to a json NEWS entry.
whatsnew: abc.ABC.  Also add issue number to news entry and reword.