Remove the XFail marking from a merge test that has been fixed by the wc-ng copy eliding code. The only reason the test still failed was a small failure in the testcase.
Remove the XFail marking from a merge test that has been fixed by the wc-ng
copy eliding code. The only reason the test still failed was a small failure
in the testcase.

* subversion/tests/cmdline/merge_tests.py
  (merge_added_subtree): Remove four slashes that made the paths not canonical.
    Remove XFail marking.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion