* subversion/libsvn_client/merge.c
  (filter_self_referential_mergeinfo): Expand the doc string.
  (merge_dir_props_changed): Remove an obsolete comment.
  (merge_file_changed): Remove an incomplete and unnecessary comment, and remove an unnecessary 'if'.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1429083 13f79535-47bb-0310-9956-ffa450edef68