Minor reword

Author: javiereguiluz

form/without_class.rst

@@ -108,6 +108,6 @@ but here's a short example:
 
 .. tip::
 
-    Remember that when your form is not mapped to an object, every object in your array of submitted data
-    will be validated with the ``Symfony\Component\Validator\Constraints\Valid`` constraint,
-    unless you disable validation like described in :doc:`this article </form/disabling_validation>`.
+    If the form is not mapped to an object, every object in your array of
+    submitted data is validated using the ``Symfony\Component\Validator\Constraints\Valid``
+    constraint, unless you :doc:`disable validation </form/disabling_validation>`.