PEP fix

InvenTree/part/models.py

@@ -642,7 +642,7 @@ class SupplierPart(models.Model):
         return cost + self.base_cost
 
     def __str__(self):
-        s =  "{supplier} ({sku})".format(
+        s = "{supplier} ({sku})".format(
             sku=self.SKU,
             supplier=self.supplier.name)