remove unnecessary slashes

This commit was SVN r6673.

orte/tools/orterun/help-orterun.txt

@@ -79,6 +79,6 @@ that was returned: %d.
  %s = %s
 in the environment. Returned value %d instead of ORTE_SUCCESS.
 [orterun:proc-aborted]
-%s noticed that job rank %lu with PID %lu on node \"%s\" exited on signal %d.
+%s noticed that job rank %lu with PID %lu on node "%s" exited on signal %d.
 [orterun:abnormal-exit]
 %s encountered an abnormal exit.