message: fix rendering of placeholder content
diff: @@ -10,8 +10,11 @@ export default Ember.Component.extend({
  return `${Ember.guidFor(this.get('content'))}/${this.get('format')}`;
  }),
  specificComponent: Ember.computed('content', 'format', function() {
  - let type = modelType(this.get('content'));
  let format = this.get('format');
  + if (this.get('content.isCardstackPlaceholder')) {
  + return `cardstack/cardstack-placeholder-${format}`;
  + }
  + let type = modelType(this.get('content'));
  return `cardstack/${type}-${format}`;
  })
  });
  