Link moved and heading updated

Author: egulias

reference/constraints/Email.rst

@@ -90,16 +90,16 @@ Basic Usage
 Options
 -------
 
-strict
-~~~~~~
 .. versionadded:: 2.5
     The ``strict`` option was introduced in Symfony 2.5.
 
+strict
+~~~~~~
+
 **type**: ``boolean`` **default**: ``false``
 
-When false, the email will be validated against a simple RegularExpression.
-If true, then the `EmailValidator <https://packagist.org/packages/egulias/email-validator>`_ library
-is required to perform an RFC compilant validation.
+When false, the email will be validated against a simple Regular Expression.
+If true, then the `egulias/email-validator`_ library is required to perform an RFC compilant validation.
 
 message
 ~~~~~~~
@@ -124,3 +124,6 @@ checkHost
 If true, then the :phpfunction:`checkdnsrr` PHP function will be used to
 check the validity of the MX *or* the A *or* the AAAA record of the host
 of the given email.
+
+
+.. _EmailValidator: https://packagist.org/packages/egulias/email-validator