Changes

In the future to see if '''ctrl-d''' works instead of issuing the exit command to quit the ipython shell. Perform the following steps to evaluate this unit. '''NOTE: Running this evaluation script will give you an error, read this error message to see if you can figure out why. This is happening because we are checking a lab script file that we HAVE NOT created yet, so these errors are ok for now.''' But run Run these check scripts regularly as you work through the labs, they may give you hints if you get stuck. <source>