Use short array deconstruction syntax.

Author: derrabus

Extension/Core/Type/FileType.php

@@ -153,7 +153,7 @@ private function getFileUploadError(int $errorCode)
         $messageParameters = [];
 
         if (\UPLOAD_ERR_INI_SIZE === $errorCode) {
-            list($limitAsString, $suffix) = $this->factorizeSizes(0, self::getMaxFilesize());
+            [$limitAsString, $suffix] = $this->factorizeSizes(0, self::getMaxFilesize());
             $messageTemplate = 'The file is too large. Allowed maximum size is {{ limit }} {{ suffix }}.';
             $messageParameters = [
                 '{{ limit }}' => $limitAsString,

FormBuilder.php

@@ -228,7 +228,7 @@ public function getIterator()
      */
     private function resolveChild(string $name): FormBuilderInterface
     {
-        list($type, $options) = $this->unresolvedChildren[$name];
+        [$type, $options] = $this->unresolvedChildren[$name];
 
         unset($this->unresolvedChildren[$name]);