`rescue_from` blocks are not as documented

[barisbalic]

Documentation suggests you can write something like this:

rescue_from :all do
  status 500
  "Oh noes."
end

However an exception is raised, expressing that the Cowboy adapter was expecting to receive a plug. In contrast the following works fine.

rescue_from :all do
  conn
  |> send_resp(500, "Oh noes.")
end

Is the documentation out of date? Or is this a bug?

[barisbalic]

I had bumped version and not seen the changes in documentation. Please ignore.