Merge pull request zendframework/zendframework#5114 in master

src/File/Exists.php

@@ -74,7 +74,7 @@ public function getDirectory($asArray = false)
         $asArray   = (bool) $asArray;
         $directory = $this->options['directory'];
         if ($asArray && isset($directory)) {
-            $directory = explode(',', (string)$directory);
+            $directory = explode(',', (string) $directory);
         }
 
         return $directory;