BUG 5004 Change text doesn't exists!

All wrong texts like doesn't exists or not exists by doesn't exist

workflow/engine/methods/tracker/authentication.php

@@ -52,7 +52,7 @@ try {
   $uid = $oCase->verifyCaseTracker($case, $pin);
 	//print_r($uid); die;
 	switch ($uid) {
-		//The case not exists
+		//The case doesn't exist
 	  case -1:
 	    G::SendTemporalMessage ('ID_CASE_NOT_EXISTS', "error");
 	    break;