Show a help text for the error message while commiting
Show a help text for the error message while commiting

* trunk/contrib/client-side/emacs/psvn.el:
  (svn-process-sentinel): Call svn-process-handle-error to handle
    error messages
  (svn-process-handle-error): New function, run svn-process-help-with-error-msg
    via electric-helpify
  (svn-process-help-with-error-msg): New function to provide help for some
    common error messages. At the moment the following message is
    handled: "Cannot non-recursively commit a directory deletion"

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