indentlabs/notebook

<li>
  <%= form.label :content, content_label %>
  <%= view_hooks.post_form.content_text_area.render self, form: form, content_label: content_label do %>
      <%= render 'thredded/posts_common/form/before_content', form: form %>
      <%= form.text_area :content, {rows: 5, required: true, autofocus: !!params[:autofocus_new_post_content], class: 'js-can-mention-pages'} %>
      <%= render 'thredded/posts_common/form/after_content', form: form %>
  <% end %>
  <div>
    <%= link_to 'https://www.markdownguide.org/basic-syntax/', target: '_blank' do %>
      <span class="hoverable badge new blue white-text" data-badge-caption="formatting help"></span>
    <% end %>
  </div>
</li>