Our test suite makes us type the same things over and over.  Let's do some of that.
Our test suite makes us type the same things over and over.  Let's do
some of that.

* subversion/tests/cmdline/diff_tests.py
  (diff_backward_repos_wc_copy): Make sure to pass username and
   password to a commit.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@867416 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion