let's play TDD, tackles closures in java

[Brian Goetz]

 > The Oracle documentation for Java SE 7 currently teaches this technique
 > 
<http://download.oracle.com/javase/7/docs/technotes/guides/security/doprivileged.html>, 


Thanks for pointing this out.  There are lots of bad practices that get 
written up by well-intentioned authors, and big companies are not immune to 
this.  I'll try to have this corrected.