Issue #18449: Make Tools/demo/ss1.py work again on Python 3.  Patch by
F?vry Thibault.
Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
Closes #18464: fix typo in test name.
- Issue #18440: Clarify that `hash()` can truncate the value returned from an
  object's custom `__hash__()` method.