fixup! CLDC-4365: Use a ternary class for two thirds conditional

app/helpers/application_helper.rb

@@ -35,10 +35,11 @@ module ApplicationHelper
   def notification_banner
     govuk_notification_banner(
       title_text: "Success",
-      success: true, title_heading_level: 3,
+      success: true,
+      title_heading_level: 3,
       title_id: "flash-notice",
       role: "alert",
-      ) do |notification_banner|
+    ) do |notification_banner|
       notification_banner.with_heading(text: flash.notice.html_safe)
       if flash[:notification_banner_body]
         tag.p flash[:notification_banner_body]&.html_safe

app/views/layouts/application.html.erb

@@ -120,15 +120,11 @@
 
       <main class="govuk-main-wrapper govuk-main-wrapper--auto-spacing" id="main-content" role="main">
         <% if flash.notice && !flash.notice.include?("translation missing") %>
-          <% if flash[:notification_banner_two_thirds] %>
+          <div class="govuk-grid-row">
-            <div class="govuk-grid-row">
+            <div class="<%= flash[:notification_banner_two_thirds] ? "govuk-grid-column-two-thirds-from-desktop" : "govuk-grid-column-full" %>">
-              <div class="govuk-grid-column-two-thirds-from-desktop">
+              <%= notification_banner %>
-                <%= notification_banner %>
-              </div>
             </div>
-          <% else %>
+          </div>
-            <%= notification_banner %>
-          <% end %>
         <% end %>
         <%= content_for?(:content) ? yield(:content) : yield %>
       </main>