JedWatson/keystone — pull request #433 by heracleskasimis (2014-06-21 16:16:10+00:00)
Title: Conditional comments at email button mixin

It seems that Jade no longer parses comment blocks.
As a result, the conditional comment at the button mixin got rendered like:
```html

```

The recommended way of writing conditional comments nowadays is:
```html

```

See related Jade issue: https://github.com/visionmedia/jade/issues/1345

(There is a discussion about the button mixin at Google Groups: https://groups.google.com/forum/#!msg/keystonejs/tYp45taolxk/w4NLyPJbVRgJ)