Minor fixups to some index entries.
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 2f0eb33..cacd8ef 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -239,9 +239,10 @@
their previous values (before the call) when returning from a function
that handled an exception.
\refbimodindex{sys}
-\ttindex{exc_type}
-\ttindex{exc_value}
-\ttindex{exc_traceback}
+\withsubitem{(in module sys)}{%
+ \ttindex{exc_type}%
+ \ttindex{exc_value}%
+ \ttindex{exc_traceback}}
\obindex{traceback}
The optional \keyword{else} clause is executed when no exception occurs