fvtt-te-deum/templates/items/item-grace-sheet.hbs

<form class="{{cssClass}}" autocomplete="off">
  <header class="sheet-header">
    <img class="item-sheet-img" src="{{img}}" data-edit="img" title="{{name}}" />
    <div class="header-fields">
      <h1 class="charname"><input name="name" type="text" value="{{name}}" placeholder="Name" /></h1>
    </div>
  </header>

  {{> systems/fvtt-te-deum/templates/items/partial-item-nav.hbs}}

  {{!-- Sheet Body --}}
  <section class="sheet-body">

    <div class="tab description" data-group="primary" data-tab="description">
      <div class="grace-texte">
        <strong>Pré-requis</strong> : {{system.prerequis}}
      </div>
      <div class="grace-texte">
        <strong>Effet</strong> : {{system.effet}}
      </div>
      <hr>
      {{editor description target="system.description" button=true owner=owner editable=editable}}
    </div>

    <div class="tab details" data-group="primary" data-tab="details">

      <div class="tab" data-group="primary">
        <h4 class="item-name-label-long">Prérequis</h4>
        <textarea name="system.prerequis" rows="6" data-dtype="String">
          {{{system.prerequis}}}
          </textarea>

        <h4 class="item-name-label-long">Effet</h4>
        <textarea name="system.effet" rows="10" data-dtype="String">
              {{{system.effet}}}
          </textarea>

      </div>
    </div>

  </section>
</form>