Add regression test for the 'svn ci ci' problem I just found out.
I expected to commit the current directory, but instead I committed nothing
at all without a warning that I had two 'ci'-s.

* subversion/tests/cmdline/commit_tests.py
  (commit_unversioned): New test. Mark as XFail.
  (test_list): Add commit_unversioned.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1489885 13f79535-47bb-0310-9956-ffa450edef68