Fix tests

Author: nicolas-grekas

Tests/Fixtures/yaml/services_bindings.yml

@@ -12,7 +12,7 @@ services:
         bind:
             Symfony\Component\DependencyInjection\Tests\Fixtures\BarInterface: '@Symfony\Component\DependencyInjection\Tests\Fixtures\Bar'
             $foo: [ ~ ]
-            iterable $baz: !tagged_iterator bar
+            iterable $baz: !tagged_iterator { tag: bar }
 
     Symfony\Component\DependencyInjection\Tests\Fixtures\Bar:
         factory: [ ~, 'create' ]