indentlabs/notebook

<div class="row card">
  <div class="col s12 m6 l6 red lighten-4">
    <%= simple_format ContentFormatterService.show(
      text:         old_value,
      viewing_user: current_user
    ) %>
  </div>
  <div class="col s12 m6 l6 green lighten-4">
    <%= simple_format ContentFormatterService.show(
      text:         new_value,
      viewing_user: current_user
    ) %>
  </div>
</div>