Drop buildbottouch again; the master is using "make touch" now.
Issue #19147: Fix docstring for fcntl.flock to refer to correct man section.
Issue #18037: 2to3 now escapes '\u' and '\U' in native strings.
Issue #19014: memoryview.cast() is now allowed on zero-length views.
[issue19151] Fix docstring and use of _get_suppported_file_loaders() to reflect 2-tuples.
[issue19152] Add ExtensionFileLoader.get_filename().
Fix typo.
[issue19152] Revert 832579dbafd6.
Close #19160: Inconsistent size for GIL release in hashlib
Close #19160: Inconsistent size for GIL release in hashlib