[imp] add code note for product.py and improve template demo.

bzr revid: amb@tinyerp.com-20131128110703-hjpru7kjwvaqfg6p

addons/product/product.py

@@ -478,6 +478,9 @@ class product_template(osv.osv):
         default = default.copy()
         default.update(name=_("%s (copy)") % (template['name']))
         id = super(product_template, self).copy(cr, uid, id, default=default, context=context)
+        '''Note: while copy a template at that time create variants(product) 
+        with old value. and due to inherits product_tmpl_id, It's update the 
+        new template name. So we are update new template name with copy.'''
         if template['product_variant_ids']:
             self.write(cr, uid, id, default, context)
         return id

addons/product/product_demo.xml

@@ -620,7 +620,7 @@ QWERTY keyboard</field>
 
 
         <record id="product_template_29" model="product.template">
-            <field name="name">Pen Drive, SP-2</field>
+            <field name="name">Pen Drive</field>
             <field name="categ_id" ref="product_category_7"/>
             <field name="public_categ_id" ref="Pen_Drive"/>
             <field name="standard_price">90.0</field>