Fix phpdoc to order by syntax convention (#5005)

Reorder the `@var` phpdoc syntax by convention, see http://docs.phpdoc.org/references/phpdoc/tags/var.html

database/factories/UserFactory.php

@@ -1,6 +1,6 @@
 <?php
 
-/* @var $factory \Illuminate\Database\Eloquent\Factory */
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
 
 use App\User;
 use Illuminate\Support\Str;