one space is enough here

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26279 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -1671,7 +1671,7 @@ class PortalTypeAllowedContentTypeTemplateItem(BaseTemplateItem):
       ob = types_tool._getOb(portal_type)
       prop_value = getattr(ob, self.class_property, ())
       if not allowed_type in prop_value and not self.is_bt_for_diff:
-        raise ValueError, "%s  %s not found in portal type %s" % (
+        raise ValueError, "%s %s not found in portal type %s" % (
                              getattr(self, 'name', self.__class__.__name__),
                              allowed_type, portal_type)