docs/diff-options: clarify scope of diff-filter types

diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh
index 347857fa7c7cb12a4bc9fd6a2f5373347a02db5c..4ac386d98b8ebdfb4808b9a8119900ee23b5dfa9 100755 (executable)
--- a/t/t7406-submodule-update.sh
+++ b/t/t7406-submodule-update.sh
@@ -442,11 +442,11 @@ test_expect_success 'submodule update - command in .git/config catches failure -
 '
 
 test_expect_success 'submodule update - command run for initial population of submodule' '
-       cat <<-\ EOF >expect
+       cat >expect <<-EOF &&
        Execution of '\''false $submodulesha1'\'' failed in submodule path '\''submodule'\''
-       EOF &&
+       EOF
        rm -rf super/submodule &&
-       test_must_fail git -C super submodule update >../actual &&
+       test_must_fail git -C super submodule update 2>actual &&
        test_cmp expect actual &&
        git -C super submodule update --checkout
 '