el_h1/h2/h3/h4 and el_button were calling el_escape() on their
content, converting any HTML children (e.g. <span class="gold">)
into literal entity text on screen.
These functions accept composed HTML children, not raw text — they
should pass the argument through like el_div/el_p/el_span do.
el_text, el_attr, el_title, el_textarea, and el_img keep escaping
(they handle actual text/attribute values, not HTML children).