tests: fix up bisect test output stable

tests: fix up bisect test output

--- a/tests/test-bisect.out	Sat Aug 21 10:41:29 2010 -0500
+++ b/tests/test-bisect.out	Sat Aug 21 10:44:57 2010 -0500
@@ -237,7 +237,7 @@
 date:        Thu Jan 01 00:00:01 1970 +0000
 summary:     msg 1
 
-abort: Inconsistent state, 31:58c80a7c8a40 is good and bad
+abort: starting revisions are not directly related
 error
 Testing changeset 15:e7fa0811edb0 (32 changesets remaining, ~5 tests)
 5cd978ea5149