Unclear pronoun ref in ex11.

ex11.tex

@@ -46,7 +46,7 @@ \section{What You Should See}
 \section{How To Break It}
 
 In your own code you should favor \ident{for-loop} constructs over
-\ident{while-loop} because they're easier to break.  Here's a few
+\ident{while-loop} because a \ident{for-loop} is harder to break.  Here's a few
 common ways:
 
 \begin{enumerate}