chore: use single extend

Author: DavideIadeluca

framework/core/tests/integration/api/discussions/CreateTest.php

@@ -79,14 +79,12 @@ public function cannot_create_discussion_without_content_property()
                 ->unparse(function ($content) {
                     return $content;
                 })
-        );
 
-        // $this->extend(
-        //     (new Extend\Event())
-        //         ->listen(\Flarum\Post\Event\Saving::class, function ($event) {
-        //             $event->post->content;
-        //     })
-        // );
+            (new Extend\Event())
+                ->listen(\Flarum\Post\Event\Saving::class, function ($event) {
+                    $event->post->content;
+            })
+        );
 
         $response = $this->send(
             $this->request('POST', '/api/discussions', [
@@ -122,14 +120,12 @@ public function cannot_create_discussion_without_content_property()
      */
     public function cannot_create_discussion_with_content_set_to_null()
     {
-        // $this->extend(
-        //     (new Extend\Formatter)
-        //         ->unparse(function ($content) {
-        //             return $content;
-        //         })
-        // );
-
         $this->extend(
+            (new Extend\Formatter)
+                ->unparse(function ($content) {
+                    return $content;
+                })
+
             (new Extend\Event())
                 ->listen(\Flarum\Post\Event\Saving::class, function ($event) {
                     $event->post->content;