chat-client/node_modules/showdown/test/cases/github-style-codeblock.md

Define a function in javascript:

function MyFunc(a) {
    var s = '`';
}

And some HTML

<div>HTML!</div>

And some CSS with spaces before the language declaration

body {
    font-size: 1.5em;
}

Use more than 3 backticks

some code

Use tilde as delimiter

another piece of code