HTML, so writing a macro which returns HTML will work in most cases but fail when formats like XML or <tt>text/plain</tt> are requested - you can use <tt class="backtick">macro.formatter</tt> to access the current formatter. <span class="anchor" id="line-145"></span><span class="anchor" id="line-146"></span><p class="line874">For example, your wiki page has the following line on it: <span class="anchor" id="line-147"></span><span class="anchor" id="line-148"></span><p class="line867"><span class="anchor" id