mailinfo: add explicit test for mails like '<a.u.thor@example.com> (A U Thor)'

Signed-off-by: NKirill Smelkov <kirr@mns.spb.ru>

t/t5100-mailinfo.sh

@@ -11,7 +11,7 @@ test_expect_success 'split sample box' \
 	'git mailsplit -o. ../t5100/sample.mbox >last &&
 	last=`cat last` &&
 	echo total is $last &&
-	test `cat last` = 12'
+	test `cat last` = 13'
 
 for mail in `echo 00*`
 do

t/t5100/info0013

+Author: A U Thor
+Email: a.u.thor@example.com
+Subject: a patch
+Date: Fri, 9 Jun 2006 00:44:16 -0700
+

t/t5100/sample.mbox

@@ -556,3 +556,8 @@ index 3fd3afb..0ee807e 100644
  #. на своей машине: отредактировать /etc/sudoers (команда ``visudo``) примерно следующим образом::
 -- 
 1.5.6.5
+From nobody Mon Sep 17 00:00:00 2001
+From: <a.u.thor@example.com> (A U Thor)
+Date: Fri, 9 Jun 2006 00:44:16 -0700
+Subject: [PATCH] a patch
+