Follow-up to r980730. Fix Windows failure due to wrong path separators.
Follow-up to r980730. Fix Windows failure due to wrong path separators.

* subversion/tests/cmdline/diff_tests.py
  (diff_prop_multiple_hunks): Use make_diff_header() that replaces all
    platform specific separators with '/' that is used consistently in
    the diff format.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@980744 13f79535-47bb-0310-9956-ffa450edef68

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