Fix exception handling to be python2.5 compatible

The exception handling introduced in commit hg:494d2550:

    Display errors containing HTML with RejectRaw (issue2550847)

contained the new style of exception handling that is not compatible
with python2.5. Rework these exception handlers to use the old style to
maintain compatibility with python2.5

Author: jerrykan

roundup/cgi/actions.py

@@ -620,7 +620,7 @@ def handle(self):
         # handle the props
         try:
             message = self._editnodes(props, links)
-        except (ValueError, KeyError, IndexError, Reject) as message:
+        except (ValueError, KeyError, IndexError, Reject), message:
             escape = not isinstance(message, RejectRaw)
             self.client.add_error_message(
                 self._('Edit Error: %s') % str(message), escape=escape)
@@ -666,7 +666,7 @@ def handle(self):
         try:
             # when it hits the None element, it'll set self.nodeid
             messages = self._editnodes(props, links)
-        except (ValueError, KeyError, IndexError, Reject) as message:
+        except (ValueError, KeyError, IndexError, Reject), message:
             escape = not isinstance(message, RejectRaw)
             # these errors might just be indicative of user dumbness
             self.client.add_error_message(_('Error: %s') % str(message),
@@ -850,7 +850,7 @@ def handle(self):
             try:
                 # when it hits the None element, it'll set self.nodeid
                 messages = self._editnodes(props, links)
-            except (ValueError, KeyError, IndexError, Reject) as message:
+            except (ValueError, KeyError, IndexError, Reject), message:
                 escape = not isinstance(message, RejectRaw)
                 # these errors might just be indicative of user dumbness
                 self.client.add_error_message(_('Error: %s') % str(message),

roundup/cgi/client.py

@@ -1274,7 +1274,7 @@ def handle_action(self):
                 return getattr(self, action_klass)()
             else:
                 return action_klass(self).execute()
-        except (ValueError, Reject) as err:
+        except (ValueError, Reject), err:
             escape = not isinstance(err, RejectRaw)
             self.add_error_message(str(err), escape=escape)