Issue #3497503: Fix typo in returned value

src/Decorator/FlysystemFileSystemTrait.php

@@ -361,7 +361,7 @@ trait FlysystemFileSystemTrait {
     if (!$writable && ($options & static::MODIFY_PERMISSIONS)) {
       return $this->chmod($directory);
     }
-    return $writeable;
+    return $writable;
   }
 
   /**