fix syntax error..

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28689 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/TradeConditionConstraint.py

@@ -42,7 +42,7 @@ class TradeConditionConstraint:
       'description'   : 'Expiration Date must be after Effective Date',
       'type'          : 'TALESConstraint',
       'condition'     : 'python: object.getExpirationDate() and '
-                        'object.getEffectiveDate()'
+                        'object.getEffectiveDate()',
       'expression'    : 'python: object.getExpirationDate() >= '
                         'object.getEffectiveDate()',
       'message_expression_false': 'Expiration date must be after effective date',