Minor cosmetic changes.

plot.py

@@ -19,6 +19,7 @@ class Enclosure(ModelSQL, ModelView):
     surface_sigpac = fields.Numeric('Surface Sigpac')
     plantation = fields.Many2One('agronomics.plantation', 'Plantation')
 
+
 class Crop(ModelSQL, ModelView):
     "Crop"
     __name__ = 'agronomics.crop'

product.py

@@ -99,8 +99,7 @@ class Product(metaclass=PoolMeta):
                 if len(product.vintages) > 1:
                     raise UserError(gettext('agronomics.msg_vintage_limit',
                     product=product.rec_name))
-            if (product.agronomic_type in
-                    ['grape']):
+            if product.agronomic_type == 'grape':
                 if len(product.varieties) > 1:
                     raise UserError(gettext('agronomics.msg_variety_limit',
                     product=product.rec_name))