Fenced code rendered incorrectly

[oschwald]

For instance

```perl
use Data::Dumper;

p Dumper('fdasf');
```

is rendered as:

<div class="markdown-content"><p><code></code><code>perl
use Data::Dumper;</p>

<p>print Dumper('fdasf');
</code><code></code></p>

This is on WordPress 4.1 with the wpautop filter disabled.

[makotokw]

I have no idea. I often use Fenced code but I never reproduce this issue.