improve deprecation messages

Author: xabbuh

Event/Event.php

@@ -44,7 +44,7 @@ public function __construct($subject, Marking $marking, Transition $transition,
             @trigger_error(sprintf('Passing only three parameters to "%s" is deprecated since Symfony 4.1. Pass a %s instance as fourth parameter instead.', __METHOD__, WorkflowInterface::class), E_USER_DEPRECATED);
             $this->workflowName = 'unnamed';
         } elseif (is_string($workflow)) {
-            @trigger_error(sprintf('Passing a string as 4th parameter of "%s" is deprecated since Symfony 4.1. Pass a %s instance instead.', __METHOD__, WorkflowInterface::class), E_USER_DEPRECATED);
+            @trigger_error(sprintf('Passing a string as the 4th parameter of "%s()" is deprecated since Symfony 4.1. Pass a %s instance instead.', __METHOD__, WorkflowInterface::class), E_USER_DEPRECATED);
             $this->workflowName = $workflow;
         } elseif ($workflow instanceof WorkflowInterface) {
             $this->workflow = $workflow;

Registry.php

@@ -31,7 +31,7 @@ class Registry
      */
     public function add(Workflow $workflow, $supportStrategy)
     {
-        @trigger_error(sprintf('%s is deprecated since Symfony 4.1. Use addWorkflow() instead.', __METHOD__), E_USER_DEPRECATED);
+        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.1. Use addWorkflow() instead.', __METHOD__), E_USER_DEPRECATED);
         $this->workflows[] = array($workflow, $supportStrategy);
     }
 

Tests/RegistryTest.php

@@ -31,7 +31,7 @@ protected function tearDown()
 
     /**
      * @group legacy
-     * @expectedDeprecation Symfony\Component\Workflow\Registry::add is deprecated since Symfony 4.1. Use addWorkflow() instead.
+     * @expectedDeprecation The "Symfony\Component\Workflow\Registry::add()" method is deprecated since Symfony 4.1. Use addWorkflow() instead.
      */
     public function testAddIsDeprecated()
     {