inline everything

Co-authored-by: Fabien Potencier <fabien@potencier.org>

tests/TemplateTest.php

@@ -395,10 +395,7 @@ public static function getGetAttributeTests()
         ]);
 
         // test for Closure::__invoke()
-        $closure = fn (): string => 'closure called';
-
-        $tests[] = [true, 'closure called', $closure, '__invoke', [], $anyType];
-
+        $tests[] = [true, 'closure called', fn (): string => 'closure called', '__invoke', [], $anyType];
         // tests when input is not an array or object
         $tests = array_merge($tests, [
             [false, null, 42, 'a', [], $anyType, 'Impossible to access an attribute ("a") on a int variable ("42") in "index.twig".'],