show: fix "range implies walking"

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

builtin/log.c

@@ -451,6 +451,9 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 	opt.tweak = show_rev_tweak_rev;
 	cmd_log_init(argc, argv, prefix, &rev, &opt);
 
+	if (!rev.no_walk)
+		return cmd_log_walk(&rev);
+
 	count = rev.pending.nr;
 	objects = rev.pending.objects;
 	for (i = 0; i < count && !ret; i++) {

t/t7007-show.sh

@@ -57,7 +57,7 @@ test_expect_success 'showing a range walks (Y shape, ^ first)' '
 	test_cmp expect actual.filtered
 '
 
-test_expect_failure 'showing a range walks (Y shape, ^ last)' '
+test_expect_success 'showing a range walks (Y shape, ^ last)' '
 	cat >expect <<-EOF &&
 	commit $(git rev-parse main3)
 	commit $(git rev-parse main2)
@@ -98,7 +98,7 @@ test_expect_success 'showing annotated tag plus commit' '
 	test_cmp expect actual.filtered
 '
 
-test_expect_failure 'showing range' '
+test_expect_success 'showing range' '
 	cat >expect <<-EOF &&
 	commit $(git rev-parse main3)
 	commit $(git rev-parse main2)