static S html_linkH3(S html, S link) {
  L<S> tok = htmlTok(html);
  L<S> h3 = first(findContainerTag(tok, "h3"));
  if (h3 != null) {
    h3 = dropFirstAndLast_noNewList(h3);
    replaceTokens(h3, ahref(link, join(h3)));
  }
  ret join(tok);
}