08_simple_regression - CSS

[gungorMetehan]

You used the same CSS codes for the exercises throughout the book. But, there is something wrong here.
I checked the codes. The - was used instead of < li >.

[betahat]

Ah - I see. I used the same css as all the other open intro labs, so maybe @mine-cetinkaya-rundel can chime in here too. Do we want to change all of them in the same way?