Add a test for a part of issue #3121 that appears to be working now.
Add a test for a part of issue #3121 that appears to be working now.

* subversion/tests/cmdline/prop_tests.py
  (peg_rev_base_working): New test.
  (test_list): Run it.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1454190 13f79535-47bb-0310-9956-ffa450edef68

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