def template
@template ||= @eruby.new "<%#encoding:UTF-8%><% if !title? %>
<% if attr? :style, 'source' %>
<programlisting#{common_attrs_erb}#{attribute('language', :language)} linenumbering="<%= (attr? :linenums) ? 'numbered' : 'unnumbered' %>"><%= template.preserve_endlines(content, self) %></programlisting>
<% else %>
<screen#{common_attrs_erb}><%= template.preserve_endlines(content, self) %></screen>
<% end %>
<% else %>
<formalpara#{common_attrs_erb}>
#{title_tag false}
<para>
<% if attr :style, 'source' %>
<programlisting language="<%= attr :language %>" linenumbering="<%= (attr? :linenums) ? 'numbered' : 'unnumbered' %>"><%= template.preserve_endlines(content, self) %></programlisting>
<% else %>
<screen><%= template.preserve_endlines(content, self) %></screen>
<% end %>
</para>
</formalpara>
<% end %>
"
end