.1.zip">Version 3.1</a>:</p>

  <ul class="rel-note">
    <li><strong>Incompatible:</strong> key handlers may
    now <em>return</em>, rather
    than <em>throw</em> <code>CodeMirror.Pass</code> to signal they
    didn't handle the key.</li>
    <li>Make documents a <a href="manual.html#api_doc">first-class
    construct</a>, support split views and subviews.</li>
    <li>Add a <a href="manual.html#addon_show-hint">new module</a>
    for showing completion hints.
    Deprecate <code>simple-hint.js</code>.</