Merge branch '4.4' into 5.2

* 4.4:
  [CS] Replace easy occurences of ?: with ??

Author: derrabus

Definition.php

@@ -44,7 +44,7 @@ public function __construct(array $places, array $transitions, $initialPlaces =
 
         $this->setInitialPlaces($initialPlaces);
 
-        $this->metadataStore = $metadataStore ?: new InMemoryMetadataStore();
+        $this->metadataStore = $metadataStore ?? new InMemoryMetadataStore();
     }
 
     /**

Metadata/InMemoryMetadataStore.php

@@ -28,7 +28,7 @@ public function __construct(array $workflowMetadata = [], array $placesMetadata
     {
         $this->workflowMetadata = $workflowMetadata;
         $this->placesMetadata = $placesMetadata;
-        $this->transitionsMetadata = $transitionsMetadata ?: new \SplObjectStorage();
+        $this->transitionsMetadata = $transitionsMetadata ?? new \SplObjectStorage();
     }
 
     public function getWorkflowMetadata(): array

StateMachine.php

@@ -22,6 +22,6 @@ class StateMachine extends Workflow
 {
     public function __construct(Definition $definition, MarkingStoreInterface $markingStore = null, EventDispatcherInterface $dispatcher = null, string $name = 'unnamed')
     {
-        parent::__construct($definition, $markingStore ?: new MethodMarkingStore(true), $dispatcher, $name);
+        parent::__construct($definition, $markingStore ?? new MethodMarkingStore(true), $dispatcher, $name);
     }
 }

Tests/EventListener/GuardListenerTest.php

@@ -136,7 +136,7 @@ public function testGuardExpressionBlocks()
     private function createEvent(Transition $transition = null)
     {
         $subject = new Subject();
-        $transition = $transition ?: new Transition('name', 'from', 'to');
+        $transition = $transition ?? new Transition('name', 'from', 'to');
 
         $workflow = $this->createMock(WorkflowInterface::class);
 

Workflow.php

@@ -70,7 +70,7 @@ class Workflow implements WorkflowInterface
     public function __construct(Definition $definition, MarkingStoreInterface $markingStore = null, EventDispatcherInterface $dispatcher = null, string $name = 'unnamed', array $eventsToDispatch = null)
     {
         $this->definition = $definition;
-        $this->markingStore = $markingStore ?: new MethodMarkingStore();
+        $this->markingStore = $markingStore ?? new MethodMarkingStore();
         $this->dispatcher = $dispatcher;
         $this->name = $name;
         $this->eventsToDispatch = $eventsToDispatch;