remove use of string exception

Author: Richard Jones

CHANGES.txt

@@ -18,6 +18,7 @@ Fixes:
   2550570)
 - don't show entire history by default
   (fixes http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=540629)
+- remove use of string exception
 
 
 2009-03-18 1.4.8 (r4209)

roundup/cgi/PageTemplates/Expressions.py

@@ -53,7 +53,8 @@ def installHandlers(engine):
 try:
     from zExceptions import Unauthorized
 except ImportError:
-    Unauthorized = "Unauthorized"
+    class Unauthorized(Exception):
+        pass
 
 def acquisition_security_filter(orig, inst, name, v, real_validate):
     if real_validate(orig, inst, name, v):