Merge pull request laravel#2747 from sald19/5.3

fix example

Author: taylorotwell

authentication.md

@@ -342,7 +342,7 @@ You may define your own authentication guards using the `extend` method on the `
 
     use App\Services\Auth\JwtGuard;
     use Illuminate\Support\Facades\Auth;
-    use Illuminate\Support\ServiceProvider;
+    use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
 
     class AuthServiceProvider extends ServiceProvider
     {

notifications.md

@@ -535,8 +535,8 @@ You may use the `from` and `to` methods to customize the sender and recipient. T
     {
         return (new SlackMessage)
                     ->from('Ghost', ':ghost:')
-                    ->to('#other');
-                    ->content('This will be sent to #other')
+                    ->to('#other')
+                    ->content('This will be sent to #other');
     }
 
 <a name="routing-slack-notifications"></a>