Full view of a quiz node - check_markup invoked twice on body

For full view of a Quiz node, in multichoice_view() function, check_markup get invoked twice on node->body. This affects some filters which output HTML code like geshi.

1. calling node_prepare($node, $teaser); applies check_markup() on node->body and produces the output code.
2. In function multichoice_render_question_form(), check_markup() is applied a second time to node->body.

$form['question'] = array('#type' => 'markup', '#value' => check_markup($node->body, $node->format, FALSE));

We may want to replace the above snippet with

$form['question'] = array('#type' => 'markup', '#value' => $node->body);

or remove node_prepare() in if(!$teaser && user_access('create multichoice')) block