[Form] Fixed FormErrorIterator class phpdoc

src/Symfony/Component/Form/FormErrorIterator.php

@@ -19,10 +19,9 @@ use Symfony\Component\Validator\ConstraintViolation;
 /**
  * Iterates over the errors of a form.
  *
- * Optionally, this class supports recursive iteration. In order to iterate
- * recursively, set the constructor argument $deep to true. Now each element
- * returned by the iterator is either an instance of {@link FormError} or of
- * {@link FormErrorIterator}, in case the errors belong to a sub-form.
+ * This class supports recursive iteration. In order to iterate recursively,
+ * pass a structure of {@link FormError} and {@link FormErrorIterator} objects
+ * to the $errors constructor argument.
  *
  * You can also wrap the iterator into a {@link \RecursiveIteratorIterator} to
  * flatten the recursive structure into a flat list of errors.