title: Add a space (" ") after an element using :after
body: <p>I want to add a blank space after some content, however the <code>content: " ";</code> doesn't seem to work.</p>
  
  <p>This is my code:</p>
  
  <pre><code>h2:after {
      content: " ";
  }
  </code></pre>
  
  <p>... which doesn't work, however this does:</p>
  
  <pre><code>h2:after {
      content: "-";
  }
  </code></pre>
  
  <p>What am I doing wrong?</p>