Generated HTML markup for Option Groups is invalid #740
Description
Reference https://validator.w3.org/#validate_by_input
The following models the way that anchor tags are used in the generated markup for option groups. However, this markup is flagged as invalid HTML by the HTML validator. (I suspected it would be.)
<!DOCTYPE HTML SYSTEM>
<html>
<head>
<title>tester</title>
</head>
<body>
<ul>
<a href="https://www.google.com/">test</a>
<li>test2</li>
</ul>
</body>
</html>
If the anchor can somehow be wrapped in a <li>, it is then valid... e.g. the following validates fine:
<!DOCTYPE HTML SYSTEM>
<html>
<head>
<title>tester</title>
</head>
<body>
<ul>
<li><a href="https://www.google.com/">test</a></li>
<li>test2</li>
</ul>
</body>
</html>