the doc for iterparse.

Also remove unused macro.

Based on the testing ideas in a patch written by Greg Malcolm.

Patch by Ingrid Cheung and Brendan McLoughlin.

Patch by Ingrid Cheung and Brendan McLoughlin.

Issue #17741: Add ElementTree.IncrementalParser, an event-driven parser for non-blocking applications.

PyUnicode_Append() cannot call directly resize_compact(): I forgot that a
string can be ready *and* not compact (a legacy string can also be ready).

Bug introduced by changesets 7ed9993d53b4 and edf029fc9591.

Bug introduced by changeset 7ed9993d53b4.

 * Add also min_char attribute to _PyUnicodeWriter structure (currently unused)
 * _PyUnicodeWriter_Init() has no more argument (except the writer itself):
   min_length and overallocate must be set explicitly
 * In error handlers, only enable overallocation if the replacement string
   is longer than 1 character
 * CJK decoders don't use overallocation anymore
 * Set min_length, instead of preallocating memory using
   _PyUnicodeWriter_Prepare(), in many decoders
 * _PyUnicode_DecodeUnicodeInternal() checks for integer overflow

registry does not grow exponentially with generation of process.

Issue #17782: Fix undefined behaviour on platforms where ``struct timespec``'s "tv_nsec" member is not a C long.

- Issue #17782: Fix undefined behaviour on platforms where ``struct timespec``'s "tv_nsec" member is not a C long.

registry does not grow exponentially with generation of process.