some tweaks to the Doctrine registration article

Author: xabbuh

cookbook/doctrine/registration_form.rst

@@ -35,7 +35,7 @@ Your ``User`` entity will probably at least have the following fields:
 ``plainPassword``
     This field is *not* persisted: (notice no ``@ORM\Column`` above it). It
     temporarily stores the plain password from the registration form. This field
-    can be validated then used to populate the ``password`` field.
+    can be validated and is then used to populate the ``password`` field.
 
 With some validation added, your class may look something like this::
 
@@ -127,17 +127,18 @@ With some validation added, your class may look something like this::
 
         public function getSalt()
         {
-            // The bcrypt algorithm don't require a separate salt.
+            // The bcrypt algorithm doesn't require a separate salt.
             // You *may* need a real salt if you choose a different encoder.
             return null;
         }
 
         // other methods, including security methods like getRoles()
     }
 
-The ``UserInterface`` requires a few other methods and your ``security.yml`` file
-needs to be configured properly to work with the ``User`` entity. For a more full
-example, see the :ref:`Entity Provider <security-crete-user-entity>` article.
+The :class:`Symfony\\Component\\Security\\Core\\User\\UserInterface` requires
+a few other methods and your ``security.yml`` file needs to be configured
+properly to work with the ``User`` entity. For a more complete example, see
+the :ref:`Entity Provider <security-crete-user-entity>` article.
 
 .. _cookbook-registration-password-max:
 
@@ -186,7 +187,7 @@ Next, create the form for the ``User`` entity::
         public function setDefaultOptions(OptionsResolverInterface $resolver)
         {
             $resolver->setDefaults(array(
-                'data_class' => 'AppBundle\Entity\User'
+                'data_class' => 'AppBundle\Entity\User',
             ));
         }
 
@@ -201,7 +202,8 @@ There are just three fields: ``email``, ``username`` and ``plainPassword``
 
 .. tip::
 
-    To explore more things about the Form component, read :doc:`/book/forms`.
+    To explore more things about the Form component, read the
+    :doc:`chapter about forms </book/forms>` in the book.
 
 Handling the Form Submission
 ----------------------------
@@ -213,10 +215,9 @@ into the database::
     // src/AppBundle/Controller/RegistrationController.php
     namespace AppBundle\Controller;
 
-    use Symfony\Bundle\FrameworkBundle\Controller\Controller;
-
     use AppBundle\Form\UserType;
     use AppBundle\Entity\User;
+    use Symfony\Bundle\FrameworkBundle\Controller\Controller;
     use Symfony\Component\HttpFoundation\Request;
     use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
 
@@ -376,8 +377,8 @@ See :doc:`/cookbook/form/form_customization` for more details.
 Update your Database Schema
 ---------------------------
 
-If you've updated the User entity during this tutorial, you have to update your
-database schema using this command:
+If you've updated the ``User`` entity during this tutorial, you have to update
+your database schema using this command:
 
 .. code-block:: bash