Code after refactoring

opportunity.py

 #This file is part of Tryton.  The COPYRIGHT file at the top level of
 #this repository contains the full copyright notices and license terms.
 "Sales extension for managing leads and opportunities"
 from trytond.model import ModelView, ModelSQL, ModelWorkflow, fields
 from trytond.pyson import Equal, Eval, Not, In, If, Get
 import datetime
 
-STATES = [('lead', 'Open Lead'),
+STATES = [('lead', 'Lead'),
           ('opportunity', 'Opportunity'),
           ('converted', 'Converted'),
           ('cancel', 'Cancelled'),
           ('lost', 'Lost'),
          ]
 _STATES_LEAD = {'readonly': Not(Equal(Eval('state'), 'lead')), }
 _STATES_CONVERTED = {'readonly': Equal(Eval('state'), 'converted'), }
 
 class SaleOpportunity(ModelWorkflow, ModelSQL, ModelView):
     'Sale Opportunity'
@@ skipping 139 matching lines @@
                         write_uid,
                         COALESCE(write_date, create_date) AS date,
                         COALESCE(write_uid,create_uid) AS user,
                         title,·
                         state,·
                         probability """
                     'FROM "%s__history"' % opportunity_object._table
                     , [])
 
 SaleOpportunityHistoryLines()