1<pre><code>
2fenced code block
3
4</code></pre>
5<pre><code>
6fenced with tildes
7
8</code></pre>
9<pre><code>long fence
10
11```
12code about code
13```
14
15</code></pre>
16<pre><code class="html" id="test">fenced code block
17</code></pre>
18