New lines created with <br> aren't retained when copying and pasting in IE9

What steps will reproduce the problem?
1. Create an element that contains <br> tags, for instance:
    <pre class="prettyprint lang-java">public class Empty{<br>}</pre>
2. Call prettyPrint()
3. Open the page in IE9
4. Try to copy and paste the code into a text editor, and note that the line 
break is lost

Replacing the <br> with a newline seems to fix the problem. For instance, using 
a bit of jQuery:

    $(".prettyprint br").each(function(index, element) {
      $(element).replaceWith(document.createTextNode("\n"));
    });

A simple example is attached.

Original issue reported on code.google.com by michael....@red-gate.com on 6 Feb 2012 at 11:53

Attachments:

google-code-prettify-copy-paste-br-ie9.html

githubramakrishnan / google-code-prettify

New lines created with <br> aren't retained when copying and pasting in IE9 #188