fixed typos in the doc

doc/providers/security.rst

@@ -470,10 +470,10 @@ sample users::
 Defining a custom Authentication Provider
 -----------------------------------------
 
-The Symfony Security components provides a lot of ready-to-use authentication
+The Symfony Security component provides a lot of ready-to-use authentication
 providers (form, HTTP, X509, remember me, ...), but you can add new ones
 easily. To register a new authentication provider, create a service named
-``security.authentication.factory.XXX`` where ``XXX``is the name you want to
+``security.authentication.factory.XXX`` where ``XXX`` is the name you want to
 use in your configuration::
 
     $app['security.authentication.factory.wsse'] = $app->protect(function ($name, $options) use ($app) {