app/views/shared/invitations/_clipboard_form.html.erb
<div class="input-group">
<%= content_tag :input, '', type: 'text', class: "form-control input-sm text-mono",id: "#{type}-#{key}", value: url, readonly: 'readonly' %>
<span class="input-group-button">
<button aria-label="<%= t('views.shared.copy_to_clipboard') %>" data-clipboard-target=<%= "##{type}-#{key}" %> class="js-clipboard btn btn-sm tooltipped tooltipped-s" type="button">
<%= octicon 'clippy' %>
</button>
</span>
</div>