title: What is the width of empty space in HTML?
body: <p>For example,</p>
  
  <pre><code>&lt;a&gt;foo&lt;/a&gt;
  &lt;a&gt;bar&lt;/a&gt;
  </code></pre>
  
  <p>And CSS</p>
  
  <pre><code>a {
      background-color:red;
  }
  </code></pre>
  
  <p>There will be a white space between the <code>a</code>, what is the width?</p>