shutil.move documentation conflicts with shutil.copy2 documentation

[JasonGross]

Documentation

cpython/Doc/library/shutil.rst

Lines 381 to 384 in a0f5c8e

	:func:`copytree` is called, passing it the *copy_function*. The
	default *copy_function* is :func:`copy2`. Using :func:`~shutil.copy` as the
	*copy_function* allows the move to succeed when it is not possible to also
	copy the metadata, at the expense of not copying any of the metadata.

cpython/Doc/library/shutil.rst

Lines 199 to 202 in a0f5c8e

	On platforms where some or all of this functionality is
	unavailable, :func:`copy2` will preserve all the metadata
	it can; :func:`copy2` never raises an exception because it
	cannot preserve file metadata.

Which is it? Does copy2 sometimes fail to copy files, or does move work fine even with copy2 on systems that cannot copy all metadata?