fix spaceless deprecation

src/Knp/Menu/Resources/views/knp_menu.html.twig

@@ -9,7 +9,7 @@
 {% endmacro %}
 
 {% block compressed_root %}
-{% apply spaceless %}
+{% apply knp_menu_spaceless %}
 {{ block('root') }}
 {% endapply %}
 {% endblock %}

src/Knp/Menu/Twig/MenuExtension.php

@@ -43,6 +43,7 @@ public function getFilters(): array
 
         return [
             new TwigFilter('knp_menu_as_string', $legacy ? [$this, 'pathAsString'] : [MenuRuntimeExtension::class, 'pathAsString']),
+            new TwigFilter('knp_menu_spaceless', [$this, 'spaceless'], ['is_safe' => ['html']]),
         ];
     }
 
@@ -121,4 +122,9 @@ public function isAncestor(ItemInterface $item, ?int $depth = null): bool
 
         return $this->runtimeExtension->isAncestor($item, $depth);
     }
+
+    public function spaceless(string $content): string
+    {
+        return trim((string) preg_replace('/>\s+</', '><', $content));
+    }
 }

tests/Knp/Menu/Tests/Renderer/TwigRendererTest.php

@@ -7,6 +7,8 @@
 use Knp\Menu\MenuItem;
 use Knp\Menu\Renderer\RendererInterface;
 use Knp\Menu\Renderer\TwigRenderer;
+use Knp\Menu\Twig\Helper;
+use Knp\Menu\Twig\MenuExtension;
 use Twig\Environment;
 use Twig\Loader\FilesystemLoader;
 
@@ -16,6 +18,7 @@ public function createRenderer(MatcherInterface $matcher): RendererInterface
     {
         $loader = new FilesystemLoader(__DIR__.'/../../../../../src/Knp/Menu/Resources/views');
         $environment = new Environment($loader);
+        $environment->addExtension(new MenuExtension($this->createMock(Helper::class)));
 
         return new TwigRenderer($environment, 'knp_menu.html.twig', $matcher, ['compressed' => true]);
     }