Use short array deconstruction syntax.

Author: derrabus

Debug/TraceableEventDispatcher.php

@@ -196,7 +196,7 @@ public function getCalledListeners(/* Request $request = null */)
         $hash = 1 <= \func_num_args() && null !== ($request = func_get_arg(0)) ? spl_object_hash($request) : null;
         $called = [];
         foreach ($this->callStack as $listener) {
-            list($eventName, $requestHash) = $this->callStack->getInfo();
+            [$eventName, $requestHash] = $this->callStack->getInfo();
             if (null === $hash || $hash === $requestHash) {
                 $called[] = $listener->getInfo($eventName);
             }
@@ -228,7 +228,7 @@ public function getNotCalledListeners(/* Request $request = null */)
 
         if (null !== $this->callStack) {
             foreach ($this->callStack as $calledListener) {
-                list(, $requestHash) = $this->callStack->getInfo();
+                [, $requestHash] = $this->callStack->getInfo();
 
                 if (null === $hash || $hash === $requestHash) {
                     $calledListeners[] = $calledListener->getWrappedListener();