title: CSS: before / after content with title
body: <p>I can do </p>
  
  <pre><code>div:after {
    content: "hello"
  }
  </code></pre>
  
  <p>But can I have the <code>hello</code> text with a title so that when I hover it with the mouse, the title is displayed?</p>
  
  <p>Thanks</p>