Avoid a deprecation warning in Rails 4.2

The deprecation is triggered by passing string keys for controller or
action to the url helper.
Makes sense. I'm confused that you removed them as _symbol_ keys (`except(:controller, :action)`), when symbol keys present shouldn't have caused that deprecation problem; string keys would have, but you removed symbol keys, not string keys. 

Ah, perhaps the options are some form of HashWithIndifferentAccess or similar leading to this confusingness.