Indention issue with function header that specifies defaults and uses shorthand block syntax

``` elixir
  defp notify_state_update(new_state, existing \\ nil)
  defp notify_state_update(new_state, existing) when new_state == existing, do: new_state
                                                                  defp notify_state_update(new_state, existing) do

                                                                  end
```

Thanks!
