<head>
<style>
    body { font-family: 'Ahem'; color:green }
    .hang { hanging-punctuation: first last; margin:1em; border:1px solid black }
</style>
</head>
<body>
<div style="float:left" class="hang">(Hang test)</div>
<div style="clear:both">
<div class="hang" style="width:10em; text-align:justify;">(This should hang.<br>(This should also hang.)</div>