代码编辑器：
x
1
<hgroup>2
<h1>Welcome to my WWF</h1>3
<h2>For a living planet</h2>4
</hgroup>5
<p>The rest of the content...</p>6
<hgroup> <h1>Welcome to my WWF</h1> <h2>For a living planet</h2></hgroup><p>The rest of the content...</p>