[HttpFoundation] fixed CS in ParameterBag class.

src/Symfony/Component/HttpFoundation/ParameterBag.php

@@ -104,7 +104,7 @@ class ParameterBag
 
         $value = $this->parameters[$root];
         $currentKey = null;
-        for ($i=$pos,$c=strlen($path); $i<$c; $i++) {
+        for ($i = $pos, $c = strlen($path); $i < $c; $i++) {
             $char = $path[$i];
 
             if ('[' === $char) {