* subversion/tests/cmdline/svntest/sandbox.py   (Sandbox.youngest): New method.
* subversion/tests/cmdline/svntest/sandbox.py
  (Sandbox.youngest): New method.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1592718 13f79535-47bb-0310-9956-ffa450edef68

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