added index entries for __*__ identifiers
diff --git a/Doc/ref/ref4.tex b/Doc/ref/ref4.tex
index 151b0ae..e4f3c2c 100644
--- a/Doc/ref/ref4.tex
+++ b/Doc/ref/ref4.tex
@@ -77,6 +77,11 @@
explicitly mentioned in a {\tt global} statement change subtly: name
lookup first searches the local name space, then the global one, then
the built-in one.}
+\bimodindex{__builtin__}
+\stindex{from}
+\stindex{exec}
+\stindex{global}
+\ttindex{NameError}
The following table lists the meaning of the local and global name
space for various types of code blocks. The name space for a
@@ -107,6 +112,7 @@
\hline
\end{tabular}
\end{center}
+\bimodindex{__main__}
Notes: