Merge pull request AllenDowney#19 from lbordoni/master

AllenDowney · AllenDowney · commit ecd2e63b9155 · 2016-05-12T07:44:12.000-04:00
Correct __lt__ method description in 18.3
diff --git a/book/book.tex b/book/book.tex
@@ -14169,7 +14169,7 @@ \section{Comparing cards}
 \index{type!programmer-defined}
 
 \verb"__lt__" takes two parameters, {\tt self} and {\tt other},
-and {\tt True} if {\tt self} is strictly less than {\tt other}.
+and returns {\tt True} if {\tt self} is strictly less than {\tt other}.
 \index{override}
 \index{operator overloading}
 
