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4 changes: 2 additions & 2 deletions book/book.tex
Original file line number Diff line number Diff line change
Expand Up @@ -2746,7 +2746,7 @@ \section{Exercises}
\item Define a new function called
\verb"do_four" that takes a function object and a value
and calls the function four times, passing the value
as a parameter. There should be only
as an argument. There should be only
two statements in the body of this function, not four.

\end{enumerate}
Expand Down Expand Up @@ -3353,7 +3353,7 @@ \section{Debugging}
\index{interface}

An interface is like a contract between a function and a caller.
The caller agrees to provide certain parameters and the function
The caller agrees to provide certain arguments and the function
agrees to do certain work.

For example, {\tt polyline} requires four arguments: {\tt t} has to be
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