Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

modules/prixcarburants/pages.py

@@ -44,6 +44,7 @@ class IndexPage(BasePage):
 
             yield product
 
+
 class ComparisonResultsPage(BasePage):
     def get_product_name(self):
         try:
@@ -75,6 +76,7 @@ class ComparisonResultsPage(BasePage):
                 price.set_empty_fields(NotAvailable)
                 yield price
 
+
 class ShopInfoPage(BasePage):
     def get_info(self):
         return self.parser.tostring(self.parser.select(self.document.getroot(), 'div.colg', 1))