Patch #849350: Update to document bool return values. Backported to 2.3.
diff --git a/Doc/lib/libpprint.tex b/Doc/lib/libpprint.tex
index 22ffd7b..66f64e2 100644
--- a/Doc/lib/libpprint.tex
+++ b/Doc/lib/libpprint.tex
@@ -111,7 +111,7 @@
 
 \begin{verbatim}
 >>> pprint.isreadable(stuff)
-0
+False
 \end{verbatim}
 \end{funcdesc}