title: How to hide / show icon with :hover
body: <p>This is exactly what I want to do
  <img src="https://i.stack.imgur.com/dYZha.png" alt="enter image description here"></p>
  
  <p>And this is my code</p>
  
  <pre><code>img.info-societe {
      cursor: pointer;
      display: none;
  }
  img.info-societe:hover {
      display: inline;
  }
  </code></pre>
  
  <p>Why doesn't it work? What's the best solution?</p>