Update _modal.html.slim with later code changes

Author: Benedikt Artelt

app/views/shared/_modal.html.slim

@@ -8,18 +8,18 @@
   .modal-dialog.modal-dialog-centered.modal-dialog-scrollable class=size
     .modal-content
       .modal-header
-        h4#modal-title.modal-title = title
-        button.btn-close data-bs-dismiss='modal' type='button'
-          span.visually-hidden Close
-      .modal-body
-        - if local_assigns.has_key?(:body)
-          = body
-        - else
-          = render(layout: false, locals: (local_assigns[:template_variables] || {}).merge(modal: true), template: template)
-      .modal-footer
-        div.footer-content
-          = yield(:modal_footer)
-        .col.d-none
-          label.p-3.form-check-label[for="flexCheckChecked"]
-            input#flexCheckChecked.form-check-input[type="checkbox" value="" unchecked]
-          == t('exercises.implement.comment.doNotShowAgain')        
+        h4.modal-title#modal-title = title
+        button.btn-close data-bs-dismiss='modal' aria-label=t('shared.close') type='button'
+          span.visually-hidden = t('shared.close')
+
+      .modal-body *modal_body_attributes
+        = render(layout: false, locals: (local_assigns[:template_variables] || {}).merge(modal: true), template:)
+
+      - if content_for? :modal_footer
+        .modal-footer
+          div.footer-content
+            = clear_content_for :modal_footer
+          .col.d-none
+            label.p-3.form-check-label[for="flexCheckChecked"]
+              input#flexCheckChecked.form-check-input[type="checkbox" value="" unchecked]
+            == t('exercises.implement.comment.doNotShowAgain')