Unit test to check if zeppelin handles ending comment.
issue addressed https://github.com/NFLabs/zeppelin/issues/151
Merge branch 'master' into handle_finish_with_comment
Merge branch 'master' into handle_finish_with_comment
Add print("") in the always to make sure not finishing with comment
better comment
Merge pull request #152 from NFLabs/handle_finish_with_comment

incomplete expression when last line is commented out