little correction

fluxRSS/src/DAL/ArticleGateway.php

@@ -54,7 +54,7 @@ class ArticleGateway
             $query = 'DELETE FROM Article;';
             $this->con->executeQuery($query);
         }catch(\PDOException $p){
-            throw new Exception("Data is not delete.");
+            throw new Exception("Data is not deleted.");
         }
     }
 }