Re: [PATCH v2 3/3] format-patch: check that header line has expected format

The format of the "From " header line is very specific to allow
utilities to detect Git-style patches.  Add a test that the patches
created are in the expected format.

Signed-off-by: brian m. carlson <redacted>
---
 t/t4014-format-patch.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index b740e3da..362bc228 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh

@@ -1437,4 +1437,10 @@ test_expect_success 'format-patch --zero-commit' '
 	test $cnt = 3
 '
 
+test_expect_success 'From line has expected format' '
+	git format-patch --stdout v2..v1 >patch2 &&
+	cnt=$(egrep "^From [0-9a-f]{40} Mon Sep 17 00:00:00 2001" patch2 | wc -l) &&
+	test $cnt = 3