openproject/app/views/attachments/_form.rhtml

<span id="attachments_fields">
  <span id="attachment_template">
    <%= file_field_tag 'attachments[1][file]', :size => 15, :id => nil, :class => "attachment_choose_file"  -%>
    <label class="label-with-input" >
      <span class="attachment_description_label_content">
        <%= l(:label_optional_description) %>
      </span>
      <%= text_field_tag 'attachments[1][description]', '', :size => 38, :id => nil %>
    </label>
  </span>
</span>
<br />
<span class="add_another_file">
  <%= link_to l(:label_add_another_file), '#', :onclick => 'addFileField(); return false;' %>
  (<%= l(:label_max_size) %>: <%= number_to_human_size(Setting.attachment_max_size.to_i.kilobytes) %>)
</span>