[Security] Example does not follow RoleVoter api

[bystones]

Hi,
the RoleVoter example in the docs (http://symfony.com/doc/current/components/security/authorization.html#rolevoter) uses vote with a string a third parameter. The api (http://api.symfony.com/2.4/Symfony/Component/Security/Core/Authorization/Voter/RoleVoter.html#method_vote) says the third parameter must be an array.

[weaverryan]

You're right! And thanks to @bicpi it's fixed!

Thanks @bystones so much for the report!