Textarea gets filled with <!---->

This controller

``` js
// controllers/message.js
import Ember from 'ember';
const { Controller } = Ember;

export defaultController.extend({
message: null
});
```

results in this html when running (`ember fastboot --serve-assets`) fastboot

``` html
<!---->
```

> Note the `` inside of the textarea.

The textarea is then cleared again when the JS in the browser takes over.

Software versions

ember-cli-fastboot: 1.0.0-beta.8
ember-cli: 2.7.0
node: 6.2.0
os: darwin x64