ter) pane is editable, and the differences with the other
pane(s) are shown live as you edit it.</p>

<p>This addon depends on
the <a href="https://code.google.com/p/google-diff-match-patch/">google-diff-match-patch</a>
library to compute the diffs.</p>

<script>
var value, orig1, orig2, dv;

function initUI(panes) {
  if (value == null) return;
  var target = document.getElementById("view");
  target.innerHTML = "";
  dv = CodeMirror.MergeView(target, {
    value: value,
    origLeft: panes == 3 ? orig1 : 