discourse/app/assets/javascripts/admin/templates/site_content_edit.js.handlebars

  <h3>{{model.title}}</h3>
  <p class='description'>{{model.description}}</p>

  {{#if model.markdown}}
    {{pagedown value=model.content}}
  {{/if}}

  {{#if model.plainText}}
    {{textarea value=model.content class="plain"}}
  {{/if}}

  {{#if model.html}}
    {{aceEditor content=model.content mode="html"}}
  {{/if}}

  {{#if model.css}}
    {{aceEditor content=model.content mode="css"}}
  {{/if}}



  <div class='controls'>
    <button class='btn' {{action saveChanges}} {{bindAttr disabled="saveDisabled"}}>
      {{#if saving}}
        {{i18n saving}}
      {{else}}
        {{i18n save}}
      {{/if}}
    </button>
    {{#if saved}}{{i18n saved}}{{/if}}
  </div>