test khung chứa code

<b:if cond='data:view.isSingleItem'>
<style>
.codeHeader{background-color:#f5f5f5;border:1px solid #e0e0e0;border-bottom:0;text-align:right;padding:2px}
.copy-text{font-size:14px;cursor:pointer;color:#707070;padding:7px 10px;border-left:1px solid #e0e0e0}
.copy-text:before{font-family:fontawesome;content:"f0c5";display:inline-block;margin-right:7px}
.copy-text:hover{color:#707070}
pre.code{display:block;background:#f9f9f9;max-height:400px;font-size:14px;color:black;text-align:left;overflow:auto;border:1px solid #d3d6db;margin:auto;padding:16px;line-height:21px;white-space:nowrap}
.tooltip{position:absolute;z-index:1030;display:block;font-size:12px;line-height:1.4;opacity:0;filter:alpha(opacity=0);visibility:visible}
.tooltip.in{opacity:.9;filter:alpha(opacity=90)}
.tooltip.top{padding:5px 0;margin-top:-3px}
.tooltip.right{padding:0 5px;margin-left:3px}
.tooltip.bottom{padding:5px 0;margin-top:3px}
.tooltip.left{padding:0 5px;margin-left:-3px}
.tooltip-inner{max-width:200px;padding:3px 8px;color:#fff;text-align:center;text-decoration:none;background-color:#000;border-radius:4px}
.tooltip-arrow{position:absolute;width:0;height:0;border-color:transparent;border-style:solid}
.tooltip.top .tooltip-arrow{bottom:0;left:50%;margin-left:-5px;border-top-color:#000;border-width:5px 5px 0}
.tooltip.top-left .tooltip-arrow{bottom:0;left:5px;border-top-color:#000;border-width:5px 5px 0}
.tooltip.top-right .tooltip-arrow{right:5px;bottom:0;border-top-color:#000;border-width:5px 5px 0}
.tooltip.right .tooltip-arrow{top:50%;left:0;margin-top:-5px;border-right-color:#000;border-width:5px 5px 5px 0}
.tooltip.left .tooltip-arrow{top:50%;right:0;margin-top:-5px;border-left-color:#000;border-width:5px 0 5px 5px}
.tooltip.bottom .tooltip-arrow{top:0;left:50%;margin-left:-5px;border-bottom-color:#000;border-width:0 5px 5px}
.tooltip.bottom-left .tooltip-arrow{top:0;left:5px;border-bottom-color:#000;border-width:0 5px 5px}
.tooltip.bottom-right .tooltip-arrow{top:0;right:5px;border-bottom-color:#000;border-width:0 5px 5px}
</style>
</b:if>