KendoUI Tester - Chart label newlines

HTML

<script src="http://cdn.kendostatic.com/2012.1.322/js/kendo.all.min.js"></script>
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.default.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.datavis.min.css">
<div id='chart'></div>

JavaScript

$(function(){
   $('#chart').kendoChart({
                        theme: $(document).data("kendoSkin") || "default",
                        title: {
                            text: "Internet Users"
                        },
                        legend: {
                            position: "bottom"
                        },
                        chartArea: {
                            background: ""
                        },
                        seriesDefaults: {
                            type: "line"
                        },
                        series: [{
                            name: "World",
                            data: [15.7, 16.7, 20, 23.5, 26.6]
                        }, {
                            name: "United States",
                            data: [67.96, 68.93, 75, 74, 78]
                        }],
                        valueAxis: {
                            labels: {
                                format: "{0}%"
                            }
                        },
                        categoryAxis: {
                            categories: ['test<tspan dx="-20px" dy="1em">label</tspan>', 2006, 2007, 2008, 2009]
                        },
                        tooltip: {
                            visible: true,
                            format: "{0}%"
                        }
                    }); 
});