Typo fixed

chapter1.tex

@@ -755,7 +755,7 @@ decisions about \emph{uses}, because they influence each other.
 \end{tfquot}\index{P!Parnas, David|)}
 A design in which modules are grouped according to control flow or
 sequence will not readily allow design changes. Structure, in the
-sense or control-flow hierarchy, is superficial.
+sense of control-flow hierarchy, is superficial.
 
 A design in which modules are grouped according to things that may
 change can readily accommodate change.%