v3.15.0b2
[3.15] gh-150285: Fix too long docstrings in the zstd module (GH-150291) (GH-150335)
gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770)
GH-136975: Emend a spelling error (algorthm -> algorithm) (#136999)
gh-139877: Use PyBytesWriter in pycore_blocks_output_buffer.h (#139976)