Fix a typo

GuilhemN · web-flow · commit 2dcb22e68e07 · 2017-01-12T17:27:24.000+01:00
diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
@@ -250,7 +250,7 @@ Validator
    ```
    
  * The default value of the strict option of the `Choice` Constraint has been
-   changed to `true` as of 4.0. If you need the the previous behaviour ensure to 
+   changed to `true` as of 4.0. If you need the previous behaviour ensure to 
    set the option to `false`.
 
 Yaml
