Pages should trim quotes from route templates

This page (HelloWorldWithRoute.cshtml):
```
@page "Some/Path/{text}"

Hello, @(ViewContext.RouteData.Values["text"])!
```

produces the route template `HelloWorldWithRoute/"Some/Path/{text}"`. The quotes should not be present in the route template.

As a workaround I'm removing the quotes from the page, but this workaround shouldn't be allowed by Razor at all.