Fix up bullet spill on command history for July 2013 Advanced Class

And like that, a stray asterisk in the [command history of the July 2013 class](http://teach.github.com/classnotes/2013-07-25-july-2013-advanced-class.html) renders the log a river of Marc Antony talking with a black bird. In the distance you can hear a local telling the onlookers to move along.

It certainly looked strange enough to think it was an error.