softcover/polytexnic — pull request #98 by mhartl (2014-01-13 22:39:44+00:00)
Title: 63658240 nested fences

This adds support for a special case of nested code fencing, such as

```text
```ruby, options: "hl_lines": [1, 2], "linenos": true
def hello; puts 'hello'; end
```
```

This makes Softcover-flavored Markdown better at talking about itself.