title: Include code from GitHub as code block in GitBook
body: <p>How can I display raw code like this in GitBook?</p>
  
  <pre><code>https://raw.githubusercontent.com/luyongxu/SignalPlot/master/Code/1.016%20Asset%20Bubbles.R
  </code></pre>
  
  <p>I believe this is related to:
  <a href="https://stackoverflow.com/questions/20161677/reading-code-from-github-as-text-raw-in-a-web-page">Reading code from GitHub as text (raw) in a web page</a>
  But I don't know how to call the JavaScript function in the main document.</p>