Tweak a test to reveal an edge-case problem.
Tweak a test to reveal an edge-case problem.

* subversion/tests/clients/cmdline/update_tests.py
  (update_xml_unsafe_dir): Add whitespace before and after our funky
    test file name, because Peter Lundblad points out that current code
    should be dropping that whitespace (and thereafter, misbehaving).
  (test_list): Expect update_xml_unsafe_dir to fail now.

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