Fix example by making the exception inherit from Exception.
diff --git a/Doc/faq/design.rst b/Doc/faq/design.rst
index 7c5116d..44931fd 100644
--- a/Doc/faq/design.rst
+++ b/Doc/faq/design.rst
@@ -728,7 +728,7 @@
 reasonable uses of the "go" or "goto" constructs of C, Fortran, and other
 languages.  For example::
 
-   class label: pass  # declare a label
+   class label(Exception): pass  # declare a label
 
    try:
         ...