title: How to quote in HTML (not blockquote)?
body: <p>I want to some sample code in a html page. How do I do it, for example I want to show a tag and image tag, in stackoverflow I use 4 spaces:</p>
  
  <pre><code>A Tag example:
  &lt;a href="your_url"&gt;&lt;/a&gt;
  
  Image Tag example:
  &lt;img...&gt;
  </code></pre>