Fixes

AllenDowney · AllenDowney · commit 0564b60e430a · 2019-06-21T12:00:25.000-04:00
diff --git a/book/book.tex b/book/book.tex
@@ -720,7 +720,7 @@ \section*{Contributor List}
 
 \item Per Starb{\"a}ck brought me up to date on universal newlines in Python 3. 
 
-\item Laurent Rosenfeld and Michaela R. (aka Mishulnya) translated this book into French.  Along the way, they sent many corrections and suggestions.
+\item Laurent Rosenfeld and Mihaela Rotaru translated this book into French.  Along the way, they sent many corrections and suggestions.
 
 % ENDCONTRIB
 
@@ -10397,7 +10397,7 @@ \section{Word frequency analysis}
 \begin{verbatim}
 >>> import string
 >>> string.punctuation
-'!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~'
+'!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'
 \end{verbatim}
 %
 Also, you might consider using the string methods {\tt strip},
diff --git a/code/do_four.py b/code/do_four.py
@@ -41,7 +41,7 @@ def do_four(func, arg):
     do_twice(func, arg)
 
 
-do_twice(print_twice, 'spam')
+do_twice(print, 'spam')
 print('')
 
-do_four(print_twice, 'spam')
+do_four(print, 'spam')
