lighting-css').parent().remove();

  // remove empty line numbers inserted by pandoc when using a
  // custom syntax highlighting theme, except when numbering line
  // in code chunk
  $('pre:not(.numberLines) code.sourceCode a:empty').remove();

  // load distill framework
  load_distill_framework();

  // wait for window.distillRunlevel == 4 to do post processing
  function distill_post_process() {

    if (!window.distillRunlevel || window.distillRunlevel < 4)
      return;

    // hide author/affiliatio