This API avoids a final call to _PyBytes_Resize() for output smaller than 512
bytes.

Small optimization: disable overallocation in binascii.rledecode_hqx() for the
last write.

Patch by Serhiy Storchaka.

Issue #25274: sys.setrecursionlimit() now raises a RecursionError if the new
recursion limit is too low depending at the current recursion depth. Modify
also the "lower-water mark" formula to make it monotonic. This mark is used to
decide when the overflowed flag of the thread state is reset.

condition in test_eintr.

the new _PyBytesWriter API.

Ignore pickle.partial symbol which comes from functools.partial.

Modify _PyBytesWriter_Finish() and _PyUnicodeWriter_Finish() to return the
empty bytes/Unicode string if the string is empty.

Don't require _PyBytesWriter pointer to be a "char *". Same change for
_PyBytesWriter_WriteBytes() parameter.

For example, binascii uses "unsigned char*".

the other buttons and the new IDLE Dark theme.

Otherwise, stray registry entries would cause issues.
Also fixes an accelerator collision and improves UAC icons when upgrading.

already supports reduce protocol 4 (issue #20289).

already supports reduce protocol 4 (issue #20289).

base64.b64encode() uses it to avoid a memory copy.