Problem with HTML escapes

I am using <pre class=”prettyprint”><code class=”language-C”> to enclose some shell script code. I originally tries without the class on the code tag. In either case, the ampersands and angle brackets in my code are shown as html ampersand escapes, evne though they show correctly in the visual editor.

Any way I can get around this?

https://www.ads-software.com/extend/plugins/prettify-code-syntax/