ignore the pattern attribute for textareas

Author: xabbuh

Extension/Core/Type/TextareaType.php

@@ -23,6 +23,7 @@ class TextareaType extends AbstractType
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
         $view->vars['pattern'] = null;
+        unset($view->vars['attr']['pattern']);
     }
 
     /**

Tests/AbstractLayoutTest.php

@@ -2068,7 +2068,7 @@ public function testTextarea()
         $this->assertWidgetMatchesXpath($form->createView(), [],
 '/textarea
     [@name="name"]
-    [@pattern="foo"]
+    [not(@pattern)]
     [.="foo&bar"]
 '
         );