Add re.fullmatch() function and regex.fullmatch() method, which anchor the
pattern at both ends of the string to match.

Patch by Matthew Barnett.
Closes #16203.
Fix display of deprecated blocks with Sphinx 1.2.
merge with 3.3
Back out accidentally pushed changeset b51218966201.
Fix a small CSS glitch with deprecated blocks and Sphinx 1.2.
merge with 3.3
Closes #17375: port new threading docstrings from 2.7.
merge with 3.3
Closes #13740: SND_NOWAIT seems to be ignored on modern Windows.
merge with 3.3
Issue #18659: fix test_format test that wasn't being executed.  Thanks Vajrasky Kok for the patch.
Remove failing checks for explicit error messages.