cosmetic tweak

src/Symfony/Component/HttpFoundation/Request.php

@@ -1029,7 +1029,7 @@ class Request
             // Cut off any q-value that might come after a semi-colon
             if (preg_match('/;\s*(q=.*$)/', $value, $match)) {
                 $q     = (float) substr(trim($match[1]), 2);
-                $value = trim(substr($value, 0, -1*strlen($match[0])));
+                $value = trim(substr($value, 0, -strlen($match[0])));
             } else {
                 $q = 1;
             }