On the 'moves-tracking-2' branch:

* subversion/include/private/svn_delta_private.h
  (svn_delta__ev3_from_delta_for_commit): Add commentary.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/move-tracking-2@1610418 13f79535-47bb-0310-9956-ffa450edef68