assert_html_equal = (actual, expected, message) => {
	try {
		assert.deepEqual(normalize_html(window, actual), normalize_html(window, expected), message);
	} catch (e) {
		if (Error.captureStackTrace)
			Error.captureStackTrace(/** @type {Error} */ (e), assert_html_equal);
		throw e;
	}
}
@param {string} actual
@param {string} expected
@param {string} [message]