Update book.tex

AllenDowney · web-flow · commit ad649788fb64 · 2018-07-03T13:14:00.000-04:00
diff --git a/book/book.tex b/book/book.tex
@@ -723,7 +723,7 @@ \section*{Contributor List}
 % ENDCONTRIB
 
 In addition, people who spotted typos or made corrections include
-Czeslaw Czapla, Dale Wilson,
+Czeslaw Czapla, Dale Wilson, Francesco Carlo Cimini,
 Richard Fursa, Brian McGhie, Lokesh Kumar Makani, Matthew Shultz, Viet
 Le, Victor Simeone, Lars O.D. Christensen, Swarup Sahoo, Alix Etienne,
 Kuang He, Wei Huang, Karen Barber, and Eric Ransom.
@@ -9724,7 +9724,7 @@ \section{Tuples as return values}
 if the value is a tuple, the effect is the same as returning
 multiple values.  For example, if you want to divide two integers
 and compute the quotient and remainder, it is inefficient to
-compute {\tt x/y} and then {\tt x\%y}.  It is better to compute
+compute {\tt x//y} and then {\tt x\%y}.  It is better to compute
 them both at the same time.
 \index{divmod}
 
