Use partial for rule translation loop during registration

app/controllers/auth/registrations_controller.rb

@@ -135,7 +135,10 @@ class Auth::RegistrationsController < Devise::RegistrationsController
     @accept_token = session[:accept_token] = SecureRandom.hex
     @invite_code  = invite_code
 
-    set_locale { render :rules }
+    set_locale do
+      @rule_translations = @rules.map { |rule| rule.translation_for(I18n.locale) }
+      render :rules
+    end
   end
 
   def is_flashing_format? # rubocop:disable Naming/PredicatePrefix

app/views/auth/registrations/rules.html.haml

@@ -17,12 +17,7 @@
     %p.lead= t('auth.rules.preamble', domain: site_hostname)
 
   %ol.rules-list
-    - @rules.each do |rule|
-      - translation = rule.translation_for(I18n.locale.to_s)
-      %li
-        %button{ type: 'button', aria: { expanded: 'false' } }
-          .rules-list__text= translation.text
-          .rules-list__hint= translation.hint
+    = render @rule_translations
 
   .stacked-actions
     - accept_path = @invite_code.present? ? public_invite_url(invite_code: @invite_code, accept: @accept_token) : new_user_registration_path(accept: @accept_token)

app/views/auth/rule_translations/_rule_translation.html.haml

@@ -0,0 +1,4 @@
+%li
+  %button{ type: 'button', aria: { expanded: 'false' } }
+    .rules-list__text= rule_translation.text
+    .rules-list__hint= rule_translation.hint