Once #864006: Improve table semantics by adding scope or headers/id attributes is done the following two todos should be solved.
+++ b/core/modules/views/views.theme.incundefined
@@ -542,6 +542,7 @@ function template_preprocess_views_view_table(&$vars) {
+ // @todo Remove field_classes to field_attributes.
@@ -606,6 +607,7 @@ function template_preprocess_views_view_table(&$vars) {
+ // @todo Rename to header_attributes.