[Form] Update password type trimming to false

UPGRADE-2.2.md

@@ -31,3 +31,7 @@
    $accepts = AcceptHeader::fromString($request->headers->get('Accept'))->all();
 
    ```
+
+### Form
+
+  * The PasswordType is now not trimmed by default.

src/Symfony/Component/Form/Extension/Core/Type/PasswordType.php

@@ -35,6 +35,7 @@ class PasswordType extends AbstractType
     {
         $resolver->setDefaults(array(
             'always_empty' => true,
+            'trim'         => false,
         ));
     }
 

src/Symfony/Component/Form/Tests/Extension/Core/Type/PasswordTypeTest.php

@@ -39,4 +39,13 @@ class PasswordTypeTest extends TypeTestCase
 
         $this->assertSame('pAs5w0rd', $view->vars['value']);
     }
+
+    public function testNotTrimmed()
+    {
+        $form = $this->factory->create('password', null);
+        $form->bind(' pAs5w0rd ');
+        $data = $form->getData();
+
+        $this->assertSame(' pAs5w0rd ', $data);
+    }
 }