diff -u b/core/modules/views/lib/Drupal/views/Plugin/views/PluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/PluginBase.php
--- b/core/modules/views/lib/Drupal/views/Plugin/views/PluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/PluginBase.php
@@ -26,7 +26,7 @@
  *   template engine extension).
  *   If a template file should be used, the file has to be placed in the
  *   module's templates folder.
- *   Example: theme = "mymodule_row" of module "mymodule" will implement either
+ *   Example: theme = "mymodule_row" of module "mymodule" will implement
  *   mymodule-row.html.twig in the [..]/modules/mymodule/templates folder.
  * - register_theme: (optional) When set to TRUE (default) the theme is
  *   registered automatically. When set to FALSE the plugin reuses an existing
diff -u b/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
--- b/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -136,7 +136,7 @@
 }
 
 /**
- * Overrides custom-block-add-list.html.twig.
+ * Overrides theme_custom_block_add_list().
  *
  * Displays the list of available custom block types for creation.
  */
@@ -159,7 +159,7 @@
 }
 
 /**
- * Overrides admin-block-content.html.twig.
+ * Overrides theme_admin_block_content().
  *
  * Uses an unordered list markup in both compact and extended mode.
  */