Lets move this into it's the HTML module, just like the Onebox module. That means we'll need to change this to

``` ruby
def raw
  raise NoMethodError, "your engine needs to implement this method"
end
```

and then write a test that makes sure this method doesn't raise an error, just like `data`.

You'll also need to `include HTML` into all the oneboxes that just use nokogiri.