Complete return of transform function

lib/Docopt.php

@@ -167,7 +167,9 @@ class Docopt {
             }
         }
         # return Either(*[Required(*e) for e in result])
-        return new Either(...$result); // FIXME: This is wrong, but I'm not sure what the Python line does, yet
+        return new Either(...array_map(function($e) {
+            return new Required(...$e);
+        }, $result));
     }
 }