Update to Drupal 8.0.0-rc3. For more information, see https://www.drupal.org/node/2608078

core/themes/bartik/templates/block.html.twig

@@ -9,8 +9,7 @@
  * - configuration: A list of the block's configuration values.
  *   - label: The configured label for the block.
  *   - label_display: The display settings for the label.
- *   - module: The module that provided this block plugin.
- *   - cache: The cache settings.
+ *   - provider: The module or other provider that provided this block plugin.
  *   - Block plugin specific settings will also be stored here.
  * - content: The content of this block.
  * - attributes: array of HTML attributes populated by modules, intended to

core/themes/bartik/templates/node.html.twig

@@ -4,12 +4,10 @@
  * Bartik's theme implementation to display a node.
  *
  * Available variables:
- * - node: Full node entity.
- *   - id: The node ID.
- *   - bundle: The type of the node, for example, "page" or "article".
- *   - authorid: The user ID of the node author.
- *   - createdtime: Time the node was published formatted in Unix timestamp.
- *   - changedtime: Time the node was changed formatted in Unix timestamp.
+ * - node: The node entity with limited access to object properties and methods.
+     Only "getter" methods (method names starting with "get", "has", or "is")
+     and a few common methods such as "id" and "label" are available. Calling
+     other methods (such as node.delete) will result in an exception.
  * - label: The title of the node.
  * - content: All node items. Use {{ content }} to print them all,
  *   or print a subset such as {{ content.field_example }}. Use