checkout: implement "-" abbreviation, add docs and tests

diff --git a/t/t4021-format-patch-numbered.sh b/t/t4021-format-patch-numbered.sh
index 43d64bbd826049c5a0a8cf365ed5cb3f4489752c..390af2389f3b9559fcfebe1e21a24317562ab7af 100755 (executable)
--- a/t/t4021-format-patch-numbered.sh
+++ b/t/t4021-format-patch-numbered.sh
@@ -45,17 +45,22 @@ test_numbered() {
        grep "^Subject: \[PATCH 2/2\]" $1
 }
 
-test_expect_success 'Default: no numbered' '
+test_expect_success 'single patch defaults to no numbers' '
+       git format-patch --stdout HEAD~1 >patch0.single &&
+       test_single_no_numbered patch0.single
+'
+
+test_expect_success 'multiple patch defaults to numbered' '
 
-       git format-patch --stdout HEAD~2 >patch0 &&
-       test_no_numbered patch0
+       git format-patch --stdout HEAD~2 >patch0.multiple &&
+       test_numbered patch0.multiple
 
 '
 
 test_expect_success 'Use --numbered' '
 
-       git format-patch --numbered --stdout HEAD~2 >patch1 &&
-       test_numbered patch1
+       git format-patch --numbered --stdout HEAD~1 >patch1 &&
+       test_single_numbered patch1
 
 '