More logging replacements in the test suite.
More logging replacements in the test suite.

* subversion/tests/cmdline/svntest/tree.py:
  s/print/logging.warn/ (using a StringIO object where appropriate)


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1299959 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion