[PATCH v4 2/2] format-patch: ignore diff.submodule setting

[Doug Kelly <dougk.ff7@gmail.com>]

diff.submodule when set to log produces output which git-am cannot
handle. Ignore this setting when generating patch output.

Signed-off-by: Doug Kelly <dougk.ff7@gmail.com>
---
 builtin/log.c           | 2 +-
 t/t4255-am-submodule.sh | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index 734aab3..cb14db4 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -705,7 +705,7 @@ static int git_format_config(const char *var, const char *value, void *cb)
 		return 0;
 	}
 	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff") ||
-	    !strcmp(var, "color.ui")) {
+	    !strcmp(var, "color.ui") || !strcmp(var, "diff.submodule")) {
 		return 0;
 	}
 	if (!strcmp(var, "format.numbered")) {
diff --git a/t/t4255-am-submodule.sh b/t/t4255-am-submodule.sh
index a38c305..27ea698 100755
--- a/t/t4255-am-submodule.sh
+++ b/t/t4255-am-submodule.sh
@@ -78,12 +78,12 @@ test_expect_success 'diff.submodule unset with extra file' '
 	run_test $THIRD second-submodule
 '
 
-test_expect_failure 'diff.submodule=log' '
+test_expect_success 'diff.submodule=log' '
 	test_config diff.submodule log &&
 	run_test $SECOND first-submodule
 '
 
-test_expect_failure 'diff.submodule=log with extra file' '
+test_expect_success 'diff.submodule=log with extra file' '
 	test_config diff.submodule log &&
 	run_test $THIRD second-submodule
 '
-- 
2.0.5