[limadog9]

Fixes #148431.

Clarify that a NULL Py_buffer.format does not imply that the original elements have size one when shape information is present. Explain that PyBUF_FORMAT is optional for structured requests and must be combined with PyBUF_ND or a flag that includes it, rather than used alone or only with PyBUF_WRITABLE.

Validation: the full Sphinx HTML build passed with warnings treated as errors; sphinx-lint and git diff --check passed. Verified the described behavior with a non-byte memoryview and _testbuffer.ndarray, covering PyBUF_ND, PyBUF_STRIDED_RO, PyBUF_SIMPLE, and format requests with and without shape information.

• Issue: Buffer requests - itemsize, format, and PyBUF_SIMPLE #148431

[read-the-docs-community]

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📚 cpython-previews | 🛠️ Build #35258028 | 📁 Comparing 9c8ed60 against main (0fba211)

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± c-api/buffer.html