Be consistent in switch usage for tar
Be consistent in switch usage for tar

tar handles switches with and witout preceding '-', but the
documentation should be consistent nonetheless.

Signed-off-by: Henrik Austad <a076b11c2cc63ccdc903dbe182e1eecc3cbbc094@austad.us>
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