fixed typos in the docs

doc/cookbook/form_no_csrf.rst

@@ -2,7 +2,7 @@ Disabling CSRF Protection on a Form using the FormExtension
 ===========================================================
 
 The *FormExtension* provides a service for building form in your application
-with the Symfony Form component. When the `CSRF Service Provider
+with the Symfony Form component. When the :doc:`CSRF Service Provider
 </providers/csrf>` is registered, the *FormExtension* uses the CSRF Protection
 avoiding Cross-site request forgery, a method by which a malicious user
 attempts to make your legitimate users unknowingly submit data that they don't

doc/providers/form.rst

@@ -186,8 +186,8 @@ You can register form type guessers by extending ``form.type.guessers``::
 
 .. warning::
 
-    CSRF protection is only available and automatically enabled when the `CSRF
-    Service Provider </providers/csrf>` is registered.
+    CSRF protection is only available and automatically enabled when the
+    :doc:`CSRF Service Provider </providers/csrf>` is registered.
 
 Traits
 ------

doc/providers/twig.rst

@@ -138,8 +138,8 @@ Rendering a Controller
 ~~~~~~~~~~~~~~~~~~~~~~
 
 A ``render`` function is also registered to help you render another controller
-from a template (available when the `HttpFragment Service Provider </providers/http_fragment>`
-is registered):
+from a template (available when the :doc:`HttpFragment Service Provider
+</providers/http_fragment>` is registered):
 
 .. code-block:: jinja