Follow-up to r1606182: Fix small typo in expected output.

Found by: rhuijben

* subversion/tests/cmdline/merge_tests.py
  (merge_old_and_new_revs_from_renamed_file): Fix expected output.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1606648 13f79535-47bb-0310-9956-ffa450edef68