cygnal-blog/plugins/toc/test_data/article_with_headers_toc_exclude_small_headers.html

<div id="toc"><ul><li><a class="toc-href" href="#" title="headers of all sizes">headers of all sizes</a><ul><li><a class="toc-href" href="#1" title="1">1</a><ul><li><a class="toc-href" href="#2" title="2">2</a><ul><li><a class="toc-href" href="#3" title="3">3</a></li></ul></li></ul></li></ul></li></ul></div>