message: Fix invalid char in attribute
diff: {{/if}}
  {{#if (is-component "cardstack-workflow")}}
  - <div class="cardstack-rail-item " (if isOpen "active")}}>
  + <div class="cardstack-rail-item {{if isOpen "active"}}">
  {{cardstack-workflow toggleOpen=(action toggleOpen)}}
  </div>
  {{/if}}
  