Fix a few minor mistakes

Please note: I am a total beginner considering Clojure, but have used Emacs for 2-3 years now, so I decided to send in these few corrections. If this corrections do not make any sense, please feel free to ignore them. On the other hand, if there is something I can improve or change about them, I would gladly do that!

Regards,
Alex
Apply feedback.
Merge pull request #135 from delexi/patch-1

Fix a few minor mistakes