Patch #1550800: make exec a function.
diff --git a/Doc/ref/ref8.tex b/Doc/ref/ref8.tex
index 45be71d..3fe4cc5 100644
--- a/Doc/ref/ref8.tex
+++ b/Doc/ref/ref8.tex
@@ -62,7 +62,7 @@
 
 \item when parsing a module;
 
-\item when parsing a string passed to the \keyword{exec} statement;
+\item when parsing a string passed to the \function{exec()} function;
 
 \end{itemize}