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.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@876773 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion