format-patch: respect --stat in cover letter's diffstat

diff --git a/t/t3210-pack-refs.sh b/t/t3210-pack-refs.sh
index 7333d7d5459179ab306d29fc04e7d088d75412af..9ea5fa4fd246374d6c49dfc35c12cfdbd84957c2 100755 (executable)
--- a/t/t3210-pack-refs.sh
+++ b/t/t3210-pack-refs.sh
@@ -127,7 +127,7 @@ test_expect_success 'explicit pack-refs with dangling packed reference' '
        git reflog expire --expire=all --all &&
        git prune --expire=all &&
        git pack-refs --all 2>result &&
-       test_cmp /dev/null result
+       test_must_be_empty result
 '
 
 test_expect_success 'delete ref with dangling packed version' '
@@ -139,7 +139,7 @@ test_expect_success 'delete ref with dangling packed version' '
        git reflog expire --expire=all --all &&
        git prune --expire=all &&
        git branch -d lamb 2>result &&
-       test_cmp /dev/null result
+       test_must_be_empty result
 '
 
 test_expect_success 'delete ref while another dangling packed ref' '
@@ -150,7 +150,7 @@ test_expect_success 'delete ref while another dangling packed ref' '
        git reflog expire --expire=all --all &&
        git prune --expire=all &&
        git branch -d lamb 2>result &&
-       test_cmp /dev/null result
+       test_must_be_empty result
 '
 
 test_expect_success 'pack ref directly below refs/' '