container wraps an internally generated
      index - this defaults to <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">section</span><span class="special">&gt;...&lt;/</span><span class="identifier">section</span><span class="special">&gt;</span></code>
      but you can use either command line options or Boost.Build Jamfile features,
      to select an alternative wrapper - for example <span class="emphasis"><em>appendix</em></span>
      or <span class="emphasis"><em