send-email: ask_default should apply to all emails, not just the first

Commit 6e18251 made the "Send this email?" prompt assume yes if confirm
= "inform" when it was unable to get a valid response. However, the
"yes" assumption only worked correctly for the first email. This commit
fixes the issue and confirms the fix by modifying the existing test for
the prompt to send multiple emails.

Reported by Matthieu Moy <Matthieu.Moy@imag.fr>

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index b4de98c..195ff8b 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -462,12 +462,14 @@
 test_expect_success 'confirm detects EOF (inform assumes y)' '
 	CONFIRM=$(git config --get sendemail.confirm) &&
 	git config --unset sendemail.confirm &&
+	rm -fr outdir &&
+	git format-patch -2 -o outdir &&
 	GIT_SEND_EMAIL_NOTTY=1 \
 		git send-email \
 			--from="Example <nobody@example.com>" \
 			--to=nobody@example.com \
 			--smtp-server="$(pwd)/fake.sendmail" \
-			$patches < /dev/null
+			outdir/*.patch < /dev/null
 	ret="$?"
 	git config sendemail.confirm ${CONFIRM:-never}
 	test $ret = "0"