Adjust t4013 tests to corrected format-patch.

Signed-off-by: Junio C Hamano <junkio@cox.net>

t/t4013/diff.format-patch_--attach_--stdout_initial..master

@@ -72,6 +72,7 @@ This is a multi-part message in MIME format.
 --------------g-i-t--v-e-r-s-i-o-n
 Content-Type: text/plain; charset=UTF-8; format=fixed
 Content-Transfer-Encoding: 8bit
+
 ---
  dir/sub |    2 ++
  file1   |    3 +++
@@ -119,6 +120,7 @@ This is a multi-part message in MIME format.
 --------------g-i-t--v-e-r-s-i-o-n
 Content-Type: text/plain; charset=UTF-8; format=fixed
 Content-Transfer-Encoding: 8bit
+
 ---
  dir/sub |    2 ++
  file0   |    3 +++

t/t4013/diff.format-patch_--attach_--stdout_initial..master^

@@ -72,6 +72,7 @@ This is a multi-part message in MIME format.
 --------------g-i-t--v-e-r-s-i-o-n
 Content-Type: text/plain; charset=UTF-8; format=fixed
 Content-Transfer-Encoding: 8bit
+
 ---
  dir/sub |    2 ++
  file1   |    3 +++

t/t4013/diff.format-patch_--attach_--stdout_initial..side

@@ -11,6 +11,7 @@ This is a multi-part message in MIME format.
 --------------g-i-t--v-e-r-s-i-o-n
 Content-Type: text/plain; charset=UTF-8; format=fixed
 Content-Transfer-Encoding: 8bit
+
 ---
  dir/sub |    2 ++
  file0   |    3 +++

t/t4013/diff.format-patch_--stdout_initial..master

@@ -48,6 +48,7 @@ From 9a6d4949b6b76956d9d5e26f2791ec2ceff5fdc0 Mon Sep 17 00:00:00 2001
 From: A U Thor <author@example.com>
 Date: Mon, 26 Jun 2006 00:02:00 +0000
 Subject: [PATCH] Third
+
 ---
  dir/sub |    2 ++
  file1   |    3 +++
@@ -80,6 +81,7 @@ From c7a2ab9e8eac7b117442a607d5a9b3950ae34d5a Mon Sep 17 00:00:00 2001
 From: A U Thor <author@example.com>
 Date: Mon, 26 Jun 2006 00:03:00 +0000
 Subject: [PATCH] Side
+
 ---
  dir/sub |    2 ++
  file0   |    3 +++

t/t4013/diff.format-patch_--stdout_initial..master^

@@ -48,6 +48,7 @@ From 9a6d4949b6b76956d9d5e26f2791ec2ceff5fdc0 Mon Sep 17 00:00:00 2001
 From: A U Thor <author@example.com>
 Date: Mon, 26 Jun 2006 00:02:00 +0000
 Subject: [PATCH] Third
+
 ---
  dir/sub |    2 ++
  file1   |    3 +++

t/t4013/diff.format-patch_--stdout_initial..side

@@ -3,6 +3,7 @@ From c7a2ab9e8eac7b117442a607d5a9b3950ae34d5a Mon Sep 17 00:00:00 2001
 From: A U Thor <author@example.com>
 Date: Mon, 26 Jun 2006 00:03:00 +0000
 Subject: [PATCH] Side
+
 ---
  dir/sub |    2 ++
  file0   |    3 +++