Update to Drupal 8.0.1. For more information, see https://www.drupal.org/node/2627402

core/modules/views/config/schema/views.argument_default.schema.yml

@@ -8,14 +8,6 @@ views.argument_default.fixed:
       type: string
       label: 'Fixed value'
 
-views.argument_default.php:
-  type: mapping
-  label: 'PHP Code'
-  mapping:
-    code:
-      type: string
-      label: 'PHP contextual filter code'
-
 views.argument_default.raw:
   type: mapping
   label: 'Raw value from URL'

core/modules/views/config/schema/views.style.schema.yml

@@ -94,7 +94,7 @@ views.style.table:
       label: 'Enable Drupal style "sticky" table headers (Javascript)'
     summary:
       type: label
-      label: 'Table summary'
+      label: 'Summary title'
     order:
       type: string
       label: 'Default order'
@@ -103,10 +103,10 @@ views.style.table:
       label: 'Show the empty text in the table'
     caption:
       type: label
-      label: 'Caption'
+      label: 'Caption for the table'
     description:
       type: text
-      label: 'Caption'
+      label: 'Table description'
 
 views.style.default_summary:
   type: views_style