If you think that the previous version was "incorrect and misleading",
the bar for changes to be accepted seems pretty high for me.

"grep -r" doesn't seem to find "flattened length" in Doc/*.

"An object that supports the :ref:`bufferobject` and is C-contiguous, like :class:`bytes`, :class:`bytearray` or :class:`memoryview`."


This implies that all memoryviews are C-contiguous.