ce <a href="manual.html#addLineClass"><code>addLineClass</code></a>
    and <a href="manual.html#removeLineClass"><code>removeLineClass</code></a>,
    drop <code>setLineClass</code>.</li>
    <li>Add a <em>lot</em> of
    new <a href="manual.html#markText">options for marked text</a>
    (read-only, atomic, collapsed, widget replacement).</li>
    <li>Remove the old code folding interface in favour of these new ranges.</li>
    <li>Add <a href="manual.html#isClean"><code>isClean</code></a>/<a href="manual.