openproject/app/views/common/preview.html.erb

<%#-- copyright
OpenProject is a project management system.
Copyright (C) 2012-2018 the OpenProject Foundation (OPF)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 3.

OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
Copyright (C) 2006-2017 Jean-Philippe Lang
Copyright (C) 2010-2013 the ChiliProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

See docs/COPYRIGHT.rdoc for more details.

++#%>

<% texts.each_pair do |caption, text| %>
  <fieldset class="preview">
    <legend class="preview--legend"><%= "#{l(:label_preview)} - #{caption}" %></legend>
    <% if text.blank? %>
      <span class="preview--nothing-to-preview"><%= l(:nothing_to_preview) %></span>
    <% else %>
      <div class="wiki">
        <%= format_text text, attachments: attachments, object: previewed %>
      </div>
    <% end %>
  </fieldset>
<% end %>