t6135: attr magic with path pattern

The test coverage on attribute magic combined with path pattern
was a bit thin.  Let's add a few and make sure "(attr:X)sub" and
"(attr:X)sub/" behave the same.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t6135-pathspec-with-attrs.sh

@@ -78,7 +78,17 @@ test_expect_success 'check specific set attr' '
 	test_cmp expect actual
 '
 
-test_expect_success 'check specific set attr (2)' '
+test_expect_success 'check set attr with pathspec pattern' '
+	echo sub/fileSetLabel >expect &&
+
+	git ls-files ":(attr:label)sub" >actual &&
+	test_cmp expect actual &&
+
+	git ls-files ":(attr:label)sub/" >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'check specific set attr in tree-ish' '
 	cat <<-\EOF >expect &&
 	HEAD:fileSetLabel
 	HEAD:sub/fileSetLabel
@@ -87,6 +97,16 @@ test_expect_success 'check specific set attr (2)' '
 	test_cmp expect actual
 '
 
+test_expect_success 'check specific set attr with pathspec pattern in tree-ish' '
+	echo HEAD:sub/fileSetLabel >expect &&
+
+	git grep -l content HEAD ":(attr:label)sub" >actual &&
+	test_cmp expect actual &&
+
+	git grep -l content HEAD ":(attr:label)sub/" >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'check specific unset attr' '
 	cat <<-\EOF >expect &&
 	fileUnsetLabel