Using CSS to shorten long lines (Ja-Purity Joomla! Theme)

I am using Geshi for my code highlighting.  Geshi does a great job with that, but not so much for wrapping very long lines of code.  There is a solution, however.  I found this solution works with IE 8.0.6001, FireFox 3.62, Opera 10.51, and Chrome 4.1.249.