Merge branch '4.4' into 5.1

* 4.4:
  Fix CS
  Fix CS
  [Validator] Add Polish translation for ISIN constraint

Author: fabpot

Cloner/VarCloner.php

@@ -98,7 +98,6 @@ protected function doClone($var)
                     case \is_int($v):
                     case \is_float($v):
                         continue 2;
-
                     case \is_string($v):
                         if ('' === $v) {
                             continue 2;