bpo-34563: Fix for invalid assert on big output of multiprocessing.Process (GH-9027) (GH-9064)

Fix for invalid assert on big output of multiprocessing.Process.
(cherry picked from commit 266f4904a222a784080e29aad0916849e507515d)

Co-authored-by: Alexander Buchkovsky <olex.buchkovsky@gmail.com>
3 files changed