Remove list style in trunk8 snippets.

Fixes #638 

#### Before
![summary-before](https://cloud.githubusercontent.com/assets/96776/3786546/eefdd86a-19da-11e4-9f35-c5b7ecf89bd2.png)

#### After closed
![contents-closed](https://cloud.githubusercontent.com/assets/96776/3786548/f124fe8e-19da-11e4-805c-723ef846b71d.png)

#### After open
![contents-opened](https://cloud.githubusercontent.com/assets/96776/3786547/f113414e-19da-11e4-8023-19c19d83d68c.png)