git-send-email: allow whitespace in addressee list
git-send-email: allow whitespace in addressee list

When interactively supplying addresses to send an email to with
send-email, whitespace after the separation comma (as in 'list, jc')
wasn't ignored.  This meant that resolving of the alias ' jc' would
fail, sending an email only to list. With this patch, the optional
trailing whitespace is ignored.

Signed-off-by: Pieter de Bie <3e6d94fbbdfd4509f62934e39a0cf25eb755747e@ai.rug.nl>
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