Preserve spaces in comments

The display mechanism turns comments into HTML, and in the process, in effect, replaces multiple spaces with single spaces, which is bad for displaying code. I fixed this by replacing line 394 with the following:

      $html .= "\t\t<div class=\"EPC-entry-comment\">" . str_replace(" ", "&nbsp;", str_replace("\n","<br/>",$data['body'])) . "</div>\n";