This documentation bug has cost me several hours of debugging :/
or use ``w#`` instead. Only single-segment buffer objects are accepted;
:exc:`TypeError` is raised for all others.
-``w#`` (read-write character buffer) [char \*, int]
+``w#`` (read-write character buffer) [char \*, Py_ssize_t]
Like ``s#``, but accepts any object which implements the read-write buffer
interface. The :ctype:`char \*` variable is set to point to the first byte of
the buffer, and the :ctype:`int` is set to the length of the buffer. Only