Minor code refactor

Author: javiereguiluz

web_link.rst

@@ -166,12 +166,9 @@ You can also add links to the HTTP response directly from controllers and servic
         public function index(Request $request)
         {
             $linkProvider = $request->attributes->get('_links', new GenericLinkProvider());
-            $request->attributes->set(
-                '_links',
-                $linkProvider->withLink(
-                    (new Link('preload', '/app.css'))->withAttribute('as', 'style')
-                )
-            );
+            $request->attributes->set('_links', $linkProvider->withLink(
+                (new Link('preload', '/app.css'))->withAttribute('as', 'style')
+            ));
 
             return $this->render('...');
         }