Update doc blocks for all app/

app/Http/Middleware/Authenticate.php

@@ -10,14 +10,14 @@ class Authenticate
     /**
      * The Guard implementation.
      *
-     * @var Guard
+     * @var \Illuminate\Contracts\Auth\Guard
      */
     protected $auth;
 
     /**
      * Create a new filter instance.
      *
-     * @param  Guard  $auth
+     * @param  \Illuminate\Contracts\Auth\Guard  $auth
      * @return void
      */
     public function __construct(Guard $auth)
@@ -29,7 +29,7 @@ class Authenticate
      * Handle an incoming request.
      *
      * @param  \Illuminate\Http\Request  $request
-     * @param  \Closure  $next
+     * @param  \Closure                  $next
      * @return mixed
      */
     public function handle($request, Closure $next)