Long line wrapping

It looks like that long lines in the description where there are only letters and underline chars are unwrapped.
![firefoxscreensnapz002](https://cloud.githubusercontent.com/assets/1065155/4232485/744cb70c-399d-11e4-8bd8-bdb78a7fa4e8.png)
To test please try to paste the following text in the description and see if is wrapped.
```
This_is_a_very_long_text_that_should_break_on_any_letter_This_is_a_very_long_text_that_should_break_on_any_letter_This_is_a_very_long_text_that_should_break_on_any_letter_This_is_a_very_long_text_that_should_break_on_any_letter_
```