<style>
blockquote {
    color: blue;
    border-left: 2px solid blue;
    padding-left: 5px;
    margin: 0px;
}
</style>

<p>We copy and paste a blockquoted paragraph plus a paragraph break.  The paragraph break shouldn't be inside the blockquote on paste.  You should see 'hello' (blockquoted), empty paragraph, 'hello' (blockquoted), empty paragraph.</p>
<div id="div" contenteditable="true"><br><blockquote id="blockquote" type="cite">hello<br></blockquote><br></div>

<script>
div = document.getElementById("div");
blockquote = document.getElementById("blockquote");
sel = window.getSelection();
sel.setBaseAndExtent(blockquote, 0, div, 2);
document.execCommand("Copy");
sel.setPosition(div, 0);
document.execCommand("Paste");
</script>