alphagov/whitehall — pull request #821 by bradleywright (2013-09-06 12:31:38+00:00)
Title: Add [Fraction:x/y] Markdown helper

This is automatically converted into a SUB/SUP construct with the correct HTML entity for a fraction divider between it.

Example:

```markdown
[Fraction:1/2]
```

becomes:

```html
1⁄2
```

`⁄` is the HTML entity for fraction separator.

This is the first part of https://www.pivotaltracker.com/story/show/56342014 .