Application pyflakes and pep8

charge.py

@@ -227,7 +227,7 @@ class ExportationCharge(Workflow, ModelSQL, ModelView):
                 subtotals[lkey].fulles += line.fulles
 
         return subtotals.values()
-    
+
     @classmethod
     def copy(cls, records, default=None):
         default = {}

invoice.py

@@ -38,7 +38,6 @@ class InvoiceLine(metaclass=PoolMeta):
         'get_packing_value')
 
     def get_packing_value(self, name=None):
-        res = []
         if self.origin and hasattr(self.origin, name):
             value = getattr(self.origin, name)
             if value:

view/farming_crop_form.xml

@@ -19,8 +19,6 @@ this repository contains the full copyright notices and license terms. -->
     <label name="production_uom"/>
     <field name="production_uom"/>
     <group id="quantity" col="6" colspan="4">
-        <label name="field_size"/>
-        <field name="field_size"/>
         <label name="total_plants"/>
         <field name="total_plants"/>
         <label name="quantity_produced"/>
@@ -58,6 +56,8 @@ this repository contains the full copyright notices and license terms. -->
         <page string="Additional Info" col="2" id="indicators">
           <label name="company"/>
           <field name="company" widget="selection"/>
+          <label name="field_size"/>
+          <field name="field_size"/>
         </page>
     </notebook>
     <group col="6" colspan="4" id="state_buttons">