Shorten comment to fit line width

Also changing from quotes to braces around list of inputs.

chapters/inheritance.tex

@@ -98,7 +98,7 @@ \section{Inheritance -- Extends Clause}\label{inheritance-extends-clause}
   extends A;
   input Real a;
 end B;
-// The inputs of B are "a, b" in that order; and the "input Real a;" is ignored.
+// The inputs of B are {a, b} in that order; the "input Real a;" is ignored.
 \end{lstlisting}
 \end{nonnormative}