Merge branch '4.1' into 4.2

* 4.1:
  fix cs
  [Validator] Allow `ConstraintViolation::__toString()` to expose codes that are not null or emtpy strings
  fix type for $value in DocBlock
  [WebProfilerBundle] Fix title case
  Fix wrapped loop of event listener
  [DI] fix edge case in InlineServiceDefinitionsPass
  undeprecate the single-colon notation for controllers
  Update HttpKernel.php

Author: nicolas-grekas

Routing/DelegatingLoader.php

@@ -100,7 +100,7 @@ public function load($resource, $type = null)
 
             if (1 === substr_count($controller, ':')) {
                 $nonDeprecatedNotation = str_replace(':', '::', $controller);
-                @trigger_error(sprintf('Referencing controllers with a single colon is deprecated since Symfony 4.1, use "%s" instead.', $nonDeprecatedNotation), E_USER_DEPRECATED);
+                // TODO deprecate this in 5.1
             }
 
             $route->setDefault('_controller', $controller);

Tests/Routing/DelegatingLoaderTest.php

@@ -68,7 +68,6 @@ public function testLoadDefaultOptions()
     /**
      * @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.
      */
     public function testLoad()
     {