Clarify a "Test failed" message.
Clarify a "Test failed" message.

* subversion/tests/cmdline/svntest/actions.py
  (run_and_verify_info):
    Remind how the output should be interpreted.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion