Converting splat attributes from Slim to ERB

I'm new to Rails and was tasked to change a legacy code that's written in slim to ERB. Everything was going smoothly, but when I reached the splat attributes and found myself blocked.

The slim I'm trying to convert is like this:

doctype html
html lang="en" *data_turbolinks_messages
  head

The respective controller is:

DATA_TURBOLINKS_MESSAGES = {
    'data-turbolinks-messages' => ENV.fetch('TURBOLINKS_MESSAGES')
  }.freeze  

def data_turbolinks_messages
    DATA_TURBOLINKS_MESSAGES
end

And the final HTML I've expected is like this:

<!DOCTYPE html>
<html data-turbolinks-messages="VariableValue" lang="en">
<head></head></html>

I've tried using slimrb --rails -e but the outcome has many slim helper objects like ::Slim::Splat::Builder.new(_slim_splat_filter) and I don't know how to write that in ERB.

Other solutions I've tried (shooting in the dark here.. again, new to Rails)

<%= **data-turbolinks-messages -%>
<%= **data-turbolinks-messages.html_safe -%>
<%= *data-turbolinks-messages %>
<%= data-turbolinks-messages.to_s %>
<% *data-turbolinks-messages.html_safe %>
<%= tag.html lang:'en' data-turbolinks-messages %>
<%= tag.html lang:'en' data: data-turbolinks-messages do %>...<% end %>
<%= tag.html lang:'en' data:{data-turbolinks-messages} do %>...<% end %>

Is there a way to bring that hash as key-value tag parameters, hopefully without changing the controller, which has other dependencies?

thanks!

Solution

Eventually I had to change the controller so the hash uses symbols as keys

DATA_TURBOLINKS_MESSAGES = {
    :'data-turbolinks-messages' => ENV.fetch('TURBOLINKS_MESSAGES')
  }.freeze  

def data_turbolinks_messages
    DATA_TURBOLINKS_MESSAGES
end

Once I did that, I could splat the hash in ERB with helper tags. I also used content_tag instead of tag.

<!DOCTYPE html>
<%= content_tag(:html, **data_turbolinks_messages, :lang => "pt" ) do %>
...
<% end %>

I still have no idea whether or not this is a good or bad solution, as I went through trial and error, so any new answers are welcome!