Comment 33 for bug 2627

  http://bazaar.launchpad.net/~launchpad-pqm/launchpad/devel/view/head:/lib/lp/bugs/browser/bug.py ::
  BugTextView::comment_text().build_message(text)

covers "View for simple text page displaying information for a bug.", but that class appears to be returning something in its render() that is text/plain, rather than the full '+bug' view.