grep: enable recurse-submodules to work on <tree> objects

diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 94ef5000e787f0898ff6ccb57661c972c765db52..566817e2efdccc4747e871f3bdabb90fa5b134ec 100755 (executable)
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -306,6 +306,8 @@ diff --no-index --name-status dir2 dir
 diff --no-index --name-status -- dir2 dir
 diff --no-index dir dir3
 diff master master^ side
+# Can't use spaces...
+diff --line-prefix=abc master master^ side
 diff --dirstat master~1 master~2
 diff --dirstat initial rearrange
 diff --dirstat-by-file initial rearrange
@@ -325,6 +327,10 @@ test_expect_success 'diff --cached -- file on unborn branch' '
        git diff --cached -- file0 >result &&
        test_cmp "$TEST_DIRECTORY/t4013/diff.diff_--cached_--_file0" result
 '
+test_expect_success 'diff --line-prefix with spaces' '
+       git diff --line-prefix="| | | " --cached -- file0 >result &&
+       test_cmp "$TEST_DIRECTORY/t4013/diff.diff_--line-prefix_--cached_--_file0" result
+'
 
 test_expect_success 'diff-tree --stdin with log formatting' '
        cat >expect <<-\EOF &&