fix typo

Author: nicolas-grekas

Tests/Routing/DelegatingLoaderTest.php

@@ -24,8 +24,8 @@ public function testConstructorApi()
 
     /**
      * @group legacy
-     * @expectedDeprecation Referencing controllers with foo:bar:baz is deprecated since Symfony 4.1. Use some_parsed::controller instead.
-     * @expectedDeprecation Referencing controllers with a single colon is deprecated since Symfony 4.1. Use foo::baz instead.
+     * @expectedDeprecation Referencing controllers with foo:bar:baz is deprecated since Symfony 4.1, use some_parsed::controller instead.
+     * @expectedDeprecation Referencing controllers with a single colon is deprecated since Symfony 4.1, use foo::baz instead.
      */
     public function testLoad()
     {