BUG 8529 Change "exists" to "exist" in many phrases SOLVED

- Remember these grammar rules
- Changed grammar rules as suggested.

workflow/engine/classes/model/TaskUser.php

@@ -96,7 +96,7 @@ class TaskUser extends BaseTaskUser {
         return $iResult;
       }
       else {
-        throw(new Exception('This row doesn\'t exists!'));
+        throw(new Exception('This row does not exist!'));
       }
     }
     catch (Exception $oError) {