fix documentation of unpack-objects -n
fix documentation of unpack-objects -n

unpack-objects -n didn't print the object list as promised on the
manual page, so alter the documentation to reflect the behaviour

Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git