remove analysis span from analysis articles

Remove the analysis span from analysis articles. As requested by @cantlin 
Before: 
![some-analysis](https://cloud.githubusercontent.com/assets/986155/4824592/5449aaac-5f5c-11e4-80a6-9628f9aa09c1.png)

After: 
![no-analysis](https://cloud.githubusercontent.com/assets/986155/4824600/676254ae-5f5c-11e4-92f2-9d485237c506.png)