Minor tweak to XFail merge test for issue #3067.
Minor tweak to XFail merge test for issue #3067.

* subversion/tests/cmdline/merge_tests.py
  (dont_merge_revs_into_subtree_that_predate_it): Don't expect merge
  notification headers for no-op ranges that are merged during discrete
  editor drives.

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