Fix some PEP8 issues

netbox/dcim/filters.py

@@ -490,6 +490,7 @@ class HistoryLogFilter(DeviceComponentFilterSet):
         model = HistoryLog
         fields = ['role']
 
+
 class ConsoleConnectionFilter(django_filters.FilterSet):
     site = django_filters.CharFilter(
         method='filter_site',

netbox/dcim/tables.py

@@ -505,6 +505,7 @@ class InterfaceConnectionTable(BaseTable):
         model = Interface
         fields = ('device_a', 'interface_a', 'device_b', 'interface_b')
 
+
 #
 # HistoryLog roles
 #

netbox/utilities/templatetags/helpers.py

@@ -51,6 +51,7 @@ def startswith(value, arg):
     """
     return str(value).startswith(arg)
 
+
 @register.filter()
 def bettertitle(value):
     """