example:

source file -
langtools/src/jdk.compiler/share/classes/com/sun/source/tree/LambdaExpressionTree.java

source code:

public interface LambdaExpressionTree extends ExpressionTree {

    /**
     * Lambda expressions come in two forms:
     * <ul compact>
     * <li> expression lambdas, whose body is an expression, and
     * <li> statement lambdas, whose body is a block
     * </ul>
     */
    @jdk.Exported
    public enum BodyKind {
...

corresponding html (images/docs/jdk/api/javac/tree/com/sun/source/tree/LambdaExpressionTree.html):

<h3>Nested Class Summary</h3>
<table class="memberSummary" summary="Nested Class Summary table, listing nested classes, and an explanation">
<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Interface and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../com/sun/source/tree/LambdaExpressionTree.BodyKind.html" title="enum in com.sun.source.tree">LambdaExpressionTree.BodyKind</a></span></code>
<div class="block">Lambda expressions come in two forms:
 <ul compact>
  expression lambdas, whose body is an expression, and
  statement lambdas, whose body is a block
 </div>
</td>


resulting Tidy warnings:

line 153 column 2 - Warning: missing <li>
line 150 column 2 - Warning: missing </ul> before </div>