1<h1>GitHub Flavored Markdown</h1>
2<h2>Multiple underscores in words</h2>
3<p>do_this_and_do_that_and_another_thing</p>
4<h2>URL autolinking</h2>
5<p><a href="http://example.com">http://example.com</a></p>
6<h2>Strikethrough</h2>
7<p><del>Mistaken text.</del></p>
8<h2>Fenced code blocks</h2>
9<pre><code>function test() {
10  console.log("notice the blank line before this function?");
11}
12</code></pre>
13<h2>Syntax highlighting</h2>
14<pre><code class="language-ruby">require 'redcarpet'
15markdown = Redcarpet.new("Hello World!")
16puts markdown.to_html
17</code></pre>
18<pre><code>this is also code
19</code></pre>
20