Fix issue in the test framework: a situation where svn doesn't return any output but we do expect some is now detected and considered an error.
Fix issue in the test framework: a situation where svn doesn't return any output
but we do expect some is now detected and considered an error.

This breaks merge_test 62, but it looks like that test should be failing anyway.

Found by: cmpilato

* subversion/tests/cmdline/svntest/verify.py
  (ExpectedOutput.is_equivalent_list): if we expect output but there's none
   raise an error.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@869294 13f79535-47bb-0310-9956-ffa450edef68

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