Refs #27919 -- Changed contrib widget's get_context() attrs kwarg to an arg.

Follow up to 075e93c16a.

django/contrib/admin/widgets.py

@@ -31,7 +31,7 @@ class FilteredSelectMultiple(forms.SelectMultiple):
         self.is_stacked = is_stacked
         super().__init__(attrs, choices)
 
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         context = super().get_context(name, value, attrs)
         context['widget']['attrs']['class'] = 'selectfilter'
         if self.is_stacked:
@@ -129,7 +129,7 @@ class ForeignKeyRawIdWidget(forms.TextInput):
         self.db = using
         super().__init__(attrs)
 
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         context = super().get_context(name, value, attrs)
         rel_to = self.rel.model
         if rel_to in self.admin_site._registry:
@@ -196,7 +196,7 @@ class ManyToManyRawIdWidget(ForeignKeyRawIdWidget):
     """
     template_name = 'admin/widgets/many_to_many_raw_id.html'
 
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         context = super().get_context(name, value, attrs)
         if self.rel.model in self.admin_site._registry:
             # The related object is registered with the same AdminSite
@@ -265,7 +265,7 @@ class RelatedFieldWidgetWrapper(forms.Widget):
         return reverse("admin:%s_%s_%s" % (info + (action,)),
                        current_app=self.admin_site.name, args=args)
 
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         from django.contrib.admin.views.main import IS_POPUP_VAR, TO_FIELD_VAR
         rel_opts = self.rel.model._meta
         info = (rel_opts.app_label, rel_opts.model_name)

django/contrib/gis/admin/widgets.py

@@ -15,7 +15,7 @@ class OpenLayersWidget(Textarea):
     """
     Render an OpenLayers map using the WKT of the geometry.
     """
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         # Update the template parameters with any attributes passed in.
         if attrs:
             self.params.update(attrs)

django/contrib/gis/forms/widgets.py

@@ -40,7 +40,7 @@ class BaseGeometryWidget(Widget):
             logger.error("Error creating geometry from value '%s' (%s)", value, err)
         return None
 
-    def get_context(self, name, value, attrs=None):
+    def get_context(self, name, value, attrs):
         # If a string reaches here (via a validation error on another
         # field) then just reconstruct the Geometry.
         if value and isinstance(value, str):