I am working on the JavaScript side of a Ruby app, but every once in a while I have to dip into the code. I am trying to figure out what a certain symbol does. 

In Haml, I have this code:

```
%footer.media-footer
          %strong
            %small
              = link_to "Edit", polymorphic_path([:edit, comment.commentable, comment]), rel: "edit nofollow", style: "display: none", remote: true, method: :get, data: { type: "text html" }

```

I am trying to figure out to what `:edit` is and what permissions are being allowed in `polymorphic_path`. I put a `pry` statement in the Haml code, but I couldn't find any information with that. 

How do I chase this down? What should be my next step?