load_subtree(): fix incorrect comment
This comment was added in
851c2b3791 (Teach notes code to properly
preserve non-notes in the notes tree, 2010-02-13) when the
corresponding code was added. But I believe it was incorrect even
then. The condition `path_len != 2` a dozen lines up prevents a path
like "dead/beef" from being converted to "de/ad/beef", and indeed the
test added in commit
851c2b3 verifies that this case works correctly.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>