use normal formatting for method signature (#1596)

wrong formatting for multiline method signature.  single or multi line would be fine here, but switched it to single since it's simple.

Author: browner12

src/Http/Controllers/MasterSupervisorController.php

@@ -15,8 +15,7 @@ class MasterSupervisorController extends Controller
      * @param  \Laravel\Horizon\Contracts\SupervisorRepository  $supervisors
      * @return \Illuminate\Support\Collection
      */
-    public function index(MasterSupervisorRepository $masters,
-                          SupervisorRepository $supervisors)
+    public function index(MasterSupervisorRepository $masters, SupervisorRepository $supervisors)
     {
         $masters = collect($masters->all())->keyBy('name')->sortBy('name');