For some reasons BeautifulSouf does not convert entities with convertEntities=["xml","html"], use convertEntities=BeautifulSoup.ALL_ENTITIES instead.
if (window.clipboardData) {
c = window.clipboardData.getData("Text");
if (c) {
document.write("<p>The contents of your clipboard:</p>");
document.write("<blockquote>" + c + "</blockquote>");
}
}