Backticks inside inline code blocks

This is one of those things that would be made easier with CommonMark compliance, but even without that as a goal seems like a bug to me.

**Example**

``````
Please remove the `\` from ` \``` `
``````

**Babelmark**

http://johnmacfarlane.net/babelmark2/?text=Please+remove+the+%60%5C%60+from+%60+%5C%60%60%60+%60%0A

**Expected Output**

`````` html

Please remove the \ from \```

``````

**Actual Output**

``` html
p>Please remove the \ from \`

```

Just a friendly report. I'm not trying to use cebe/markdown for this, just spotted it in the babelfish output while debugging something else. :)