Merge pull request laravel#2455 from ndeet/patch-1

Remove old reference to mailer and replace it with UserRepository

Author: taylorotwell

container.md

@@ -60,7 +60,7 @@ Let's look at a simple example:
         }
     }
 
-In this example, the `UserController` needs to retrieve users from a data source. So, we will **inject** a service that is able to retrieve users. In this context, our `UserRepository` most likely uses [Eloquent](/docs/{{version}}/eloquent) to retrieve user information from the database. However, since the repository is injected, we are able to easily swap it out with another implementation. We are also able to easily "mock", or create a dummy implementation of the mailer when testing our application.
+In this example, the `UserController` needs to retrieve users from a data source. So, we will **inject** a service that is able to retrieve users. In this context, our `UserRepository` most likely uses [Eloquent](/docs/{{version}}/eloquent) to retrieve user information from the database. However, since the repository is injected, we are able to easily swap it out with another implementation. We are also able to easily "mock", or create a dummy implementation of the `UserRepository` when testing our application.
 
 A deep understanding of the Laravel service container is essential to building a powerful, large application, as well as for contributing to the Laravel core itself.