<h1>GitHub Flavored Markdown</h1>
<h2>Multiple underscores in words</h2>
<p>do_this_and_do_that_and_another_thing</p>
<h2>URL autolinking</h2>
<p><a href="http://example.com">http://example.com</a></p>
<h2>Strikethrough</h2>
<p><del>Mistaken text.</del></p>
<h2>Fenced code blocks</h2>
<pre><code>function test() {
  console.log("notice the blank line before this function?");
}
</code></pre>
<h2>Syntax highlighting</h2>
<pre><code class="language-ruby">require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html
</code></pre>
<pre><code>this is also code
</code></pre>