When a fenced code block is on a list, a line starting from dash breaks formatting.

example:

````
- test1

 ```
 - test
 ```
- test2

 ```
 - test
 ```
- test3

 ```
 - test
 ```

````

output:
<ul>
<li>test1

&rdquo;`

<ul>
<li>test</li>
</ul>

&rdquo;`</li>

<li>test2

&rdquo;`

<pre><code> - test
</code></pre>
&rdquo;`</li>

<li>test3

<pre><code> - test
</code></pre></li>
</ul>