message: set lastNode directly when not decending
diff: @@ -192,8 +192,11 @@ function parseHtmlMessage(html, partCreator) {
  if (lastNode && lastNode.nodeName === "BLOCKQUOTE") {
  parts.push(partCreator.newline());
  }
  - lastNode = null;
  - return checkDecendInto(n);
  + const decend = checkDecendInto(n);
  + // when not decending (like for PRE), onNodeLeave won't be called to set lastNode
  + // so do that here.
  + lastNode = decend ? null : n;
  + return decend;
  }
  function onNodeLeave(n) {
  