magento#12499: Format generated config files using the short array syntax

 - minor coding style improvement

Author: ishakhsuvarov

lib/internal/Magento/Framework/App/DeploymentConfig/Writer/PhpFormatter.php

@@ -75,8 +75,8 @@ private function formatData($data, $comments = [], $prefix = '  ')
      * If variable to export is an array, format with the php >= 5.4 short array syntax. Otherwise use
      * default var_export functionality.
      *
-     * @param mixed   $var
-     * @param integer $depth
+     * @param mixed $var
+     * @param int $depth
      * @return string
      */
     private function varExportShort($var, int $depth = 0): string