PEP style fixes

InvenTree/plugin/api.py

@@ -47,7 +47,7 @@ class PluginList(generics.ListAPIView):
             for result in queryset:
                 if mixin in result.mixins().keys():
                     matches.append(result.pk)
-            
+
             queryset = queryset.filter(pk__in=matches)
 
         return queryset

InvenTree/plugin/builtin/integration/mixins.py

@@ -453,11 +453,11 @@ class LocateMixin:
 
     class MixinMeta:
         MIXIN_NAME = "Locate"
-    
+
     def __init__(self):
         super().__init__()
         self.add_mixin('locate', True, __class__)
-    
+
     def locate_stock_item(self, item_pk):
         """
         Attempt to locate a particular StockItem
@@ -490,10 +490,10 @@ class LocateMixin:
     def locate_stock_location(self, location_pk):
         """
         Attempt to location a particular StockLocation
-        
+
         Arguments:
             location_pk: The PK (primary key) of the StockLocation to be located
-        
+
         Note: The default implementation here does nothing!
         """
         ...

InvenTree/plugin/templatetags/plugin_extras.py

@@ -44,6 +44,7 @@ def mixin_enabled(plugin, key, *args, **kwargs):
     """
     return plugin.mixin_enabled(key)
 
+
 @register.simple_tag()
 def mixin_available(mixin, *args, **kwargs):
     """
@@ -51,6 +52,7 @@ def mixin_available(mixin, *args, **kwargs):
     """
     return len(registry.with_mixin(mixin)) > 0
 
+
 @register.simple_tag()
 def navigation_enabled(*args, **kwargs):
     """