* subversion/tests/cmdline/merge_tests.py
  (merge_source_with_replacement): Add diagram from #4138 desc6 as a comment,
   and tweak wording in another comment for clarity.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1453753 13f79535-47bb-0310-9956-ffa450edef68