Actual Behavior

When using json as request format by default, without using .json extensions, the RouteProvider cuts off the last character of the url.

Expected Behavior

The RouteProvider should check if the extension exists, or only remove the actual extension.

Steps to Reproduce

When you set the request format in your project:

$request->setRequestFormat('json');

And visit a URL that should be routed by the RouteProvider, the page is not found.