tag positioning fix

again

Before
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![image](https://cloud.githubusercontent.com/assets/960919/4700397/87e7ec00-584c-11e4-812b-a4628610f1f6.png)
After
------
![image](https://cloud.githubusercontent.com/assets/960919/4700399/8e71dcca-584c-11e4-9845-3ed31d7c7d88.png)

this could `private lazy val` in `ArticleLayout`, and not mapped for easier greppability