On the 'move-tracking-2' branch: Adjust doc strings following r1697609.
On the 'move-tracking-2' branch: Adjust doc strings following r1697609.

* subversion/include/private/svn_editor3e.h
  (svn_editor3_add,
   svn_editor3_delete,
   svn_editor3_alter): Adjust doc strings: s/branch/branch_id/.

git-svn-id: 486ec3464084f62cfe8608152673c827b947faa2@1697629 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion