Added sentence "All exceptions must have an executable block."; from
Dan Wolfe <wolfeman@apple.com>.
diff --git a/Doc/ref/ref7.tex b/Doc/ref/ref7.tex
index 437716b..7538caa 100644
--- a/Doc/ref/ref7.tex
+++ b/Doc/ref/ref7.tex
@@ -218,7 +218,8 @@
When a matching except clause is found, the exception's parameter is
assigned to the target specified in that except clause, if present,
-and the except clause's suite is executed. When the end of this suite
+and the except clause's suite is executed. All except clauses must
+have an executable block. When the end of this block
is reached, execution continues normally after the entire try
statement. (This means that if two nested handlers exist for the same
exception, and the exception occurs in the try clause of the inner