Began styling with bourbon, neat, bitters. Began move to HAML

I tried to make the layout in HAML, but when I tried to display the root page (which is ERB) and tell it to layout with HAML, it kept throwing errors.

`erb :root, :layout => :layout` is what it was prior, but from what I was reading in the documentation sinatra defaults to looking for the layout file in the same format. I couldn't find a way to display an erb page within a HAML layout without throwing an error. Maybe I mis-read something?