Patch #1550800: make exec a function.
diff --git a/Doc/howto/doanddont.tex b/Doc/howto/doanddont.tex
index df3ca34..d81c374 100644
--- a/Doc/howto/doanddont.tex
+++ b/Doc/howto/doanddont.tex
@@ -81,7 +81,7 @@
\end{itemize}
-\subsection{Unadorned \keyword{exec}, \function{execfile} and friends}
+\subsection{Unadorned \function{exec}, \function{execfile} and friends}
The word ``unadorned'' refers to the use without an explicit dictionary,
in which case those constructs evaluate code in the {\em current} environment.
@@ -93,10 +93,10 @@
\begin{verbatim}
>>> for name in sys.argv[1:]:
->>> exec "%s=1" % name
+>>> exec("%s=1" % name)
>>> def func(s, **kw):
>>> for var, val in kw.items():
->>> exec "s.%s=val" % var # invalid!
+>>> exec("s.%s=val" % var) # invalid!
>>> execfile("handler.py")
>>> handle()
\end{verbatim}