Fix the cat tests on Win32.
Fix the cat tests on Win32.

* subversion/tests/clients/cmdline/cat_tests.py
  (cat_skip_uncattable): Make expected_err a list to avoid using a regex
  which wants the backslashes in the path to be escaped.

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