function valueless_option(payload, children) {
	var i = payload.out.length;

	children();

	var body = payload.out.slice(i);

	if (body.replace(/<!---->/g, '') === payload.select_value) {
		// replace '>' with ' selected>' (closing tag will be added later)
		payload.out = payload.out.slice(0, i - 1) + ' selected>' + body;
	}
}
@param {Payload} payload
@param {() => void} children
@returns {void}