PEP8 fixes

netbox/dcim/filters.py

@@ -207,7 +207,7 @@ class RackReservationFilter(django_filters.FilterSet):
     user = django_filters.ModelMultipleChoiceFilter(
         name='user',
         queryset=User.objects.all(),
-        to_field_name = 'username',
+        to_field_name='username',
         label='User (name)',
     )
 

netbox/dcim/models.py

@@ -1318,7 +1318,6 @@ class InventoryItem(models.Model):
     discovered = models.BooleanField(default=False, verbose_name='Discovered')
     description = models.CharField(max_length=100, blank=True)
 
-
     class Meta:
         ordering = ['device__id', 'parent__id', 'name']
         unique_together = ['device', 'parent', 'name']