fix PHP code block

Author: xabbuh

components/form/type_guesser.rst

@@ -74,7 +74,7 @@ that the type guesser cannot guess the type.
 
 The ``TypeGuess`` constructor requires 3 options:
 
-* The type name (one of the :doc:`form types </reference/forms/types`);
+* The type name (one of the :doc:`form types </reference/forms/types>`);
 * Additional options (for instance, when the type is ``entity``, you also
   want to set the ``class`` option). If no types are guessed, this should be
   set to an empty array;

components/security/authentication.rst

@@ -205,7 +205,7 @@ own, it just needs to follow these rules:
    must first of all make sure the password is not too long, i.e. the password length is no longer
    than 4096 characters. This is for security reasons (see `CVE-2013-5750`_), and you can use the
    :method:`Symfony\\Component\\Security\\Core\\Encoder\\BasePasswordEncoder::isPasswordTooLong`
-   method for this check:
+   method for this check::
 
        use Symfony\Component\Security\Core\Exception\BadCredentialsException;