t3206-range-diff.sh: cover single-patch case

diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index dd854b6ebc34623afa61486b8993bd31a0a8c070..6babc0e27673eb50cc3d55ed1dae3aedcd1b7161 100755 (executable)
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -142,7 +142,7 @@ test_expect_success 'changed message' '
        test_cmp expected actual
 '
 
-for prev in topic
+for prev in topic master..topic
 do
        test_expect_success "format-patch --range-diff=$prev" '
                git format-patch --stdout --cover-letter --range-diff=$prev \
@@ -154,4 +154,9 @@ do
        '
 done
 
+test_expect_success 'format-patch --range-diff as commentary' '
+       git format-patch --stdout --range-diff=HEAD~1 HEAD~1 >actual &&
+       test_i18ngrep "^Range-diff:$" actual
+'
+
 test_done