diff --git a/actionview/lib/action_view/helpers/form_helper.rb b/actionview/lib/action_view/helpers/form_helper.rb
index 996bdecaf6..7cfd2df5e6 100644
--- a/actionview/lib/action_view/helpers/form_helper.rb
+++ b/actionview/lib/action_view/helpers/form_helper.rb
@@ -1121,6 +1121,8 @@ def fields(scope = nil, model: nil, **options, &block)
       #       post:
       #         cost: "Total cost"
       #
+      # <code></code>
+      #
       #   label(:post, :cost)
       #   # => <label for="post_cost">Total cost</label>
       #
@@ -2365,6 +2367,8 @@ def fields(scope = nil, model: nil, **options, &block)
       #       post:
       #         cost: "Total cost"
       #
+      # <code></code>
+      #
       #   label(:cost)
       #   # => <label for="post_cost">Total cost</label>
       #
diff --git a/actionview/lib/action_view/helpers/sanitize_helper.rb b/actionview/lib/action_view/helpers/sanitize_helper.rb
index a16b4a32c8..089e613204 100644
--- a/actionview/lib/action_view/helpers/sanitize_helper.rb
+++ b/actionview/lib/action_view/helpers/sanitize_helper.rb
@@ -60,6 +60,8 @@ module SanitizeHelper
       #     end
       #   end
       #
+      # <code></code>
+      #
       #   <%= sanitize @comment.body, scrubber: CommentScrubber.new %>
       #
       # See {Rails HTML Sanitizer}[https://github.com/rails/rails-html-sanitizer] for
@@ -71,6 +73,8 @@ module SanitizeHelper
       #     node.remove if node.name == 'script'
       #   end
       #
+      # <code></code>
+      #
       #   <%= sanitize @comment.body, scrubber: scrubber %>
       #
       # See {Loofah's documentation}[https://github.com/flavorjones/loofah] for more
diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index 9cb7400126..c6264cb50d 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -268,6 +268,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     name: Reginald the Pirate
   #     monkey_id: 1
   #
+  # <code></code>
+  #
   #   ### in monkeys.yml
   #
   #   george:
@@ -285,6 +287,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     name: Reginald the Pirate
   #     monkey: george
   #
+  # <code></code>
+  #
   #   ### in monkeys.yml
   #
   #   george:
@@ -306,6 +310,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #
   #   belongs_to :eater, polymorphic: true
   #
+  # <code></code>
+  #
   #   ### in fruits.yml
   #
   #   apple:
@@ -331,6 +337,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     id: 1
   #     name: George the Monkey
   #
+  # <code></code>
+  #
   #   ### in fruits.yml
   #
   #   apple:
@@ -345,6 +353,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     id: 3
   #     name: grape
   #
+  # <code></code>
+  #
   #   ### in fruits_monkeys.yml
   #
   #   apple_george:
@@ -368,6 +378,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     name: George the Monkey
   #     fruits: apple, orange, grape
   #
+  # <code></code>
+  #
   #   ### in fruits.yml
   #
   #   apple:
@@ -467,6 +479,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     belongs_to :author
   #   end
   #
+  # <code></code>
+  #
   #   # books.yml
   #   alices_adventure_in_wonderland:
   #     author_id: <%= ActiveRecord::FixtureSet.identify(:lewis_carroll) %>
@@ -482,6 +496,8 @@ class FixtureClassNotFound < ActiveRecord::ActiveRecordError # :nodoc:
   #     belongs_to :book, query_constraints: [:author_id, :book_id]
   #   end
   #
+  # <code></code>
+  #
   #   # book_orders.yml
   #   alices_adventure_in_wonderland_in_books:
   #     author: lewis_carroll
diff --git a/activestorage/lib/active_storage/fixture_set.rb b/activestorage/lib/active_storage/fixture_set.rb
index 2611a3821c..b046b6859a 100644
--- a/activestorage/lib/active_storage/fixture_set.rb
+++ b/activestorage/lib/active_storage/fixture_set.rb
@@ -26,9 +26,13 @@ module ActiveStorage
   #     has_one_attached :thumbnail
   #   end
   #
+  # <code></code>
+  #
   #   # fixtures/active_storage/blobs.yml
   #   first_thumbnail_blob: <%= ActiveStorage::FixtureSet.blob filename: "first.png" %>
   #
+  # <code></code>
+  #
   #   # fixtures/active_storage/attachments.yml
   #   first_thumbnail_attachment:
   #     name: thumbnail
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 2cf734b0e5..94e91eb478 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -234,8 +234,7 @@ def deprecators
     end
 
     # Convenience for loading config/foo.yml for the current \Rails env.
-    #
-    # Examples:
+    # Example:
     #
     #     # config/exception_notification.yml:
     #     production:
@@ -246,13 +245,15 @@ def deprecators
     #       url: http://localhost:3001
     #       namespace: my_app_development
     #
+    # <code></code>
+    #
     #     # config/environments/production.rb
     #     Rails.application.configure do
     #       config.middleware.use ExceptionNotifier, config_for(:exception_notification)
     #     end
     #
-    #     # You can also store configurations in a shared section which will be
-    #     # merged with the environment configuration
+    # You can also store configurations in a shared section which will be merged
+    # with the environment configuration
     #
     #     # config/example.yml
     #     shared:
@@ -265,6 +266,8 @@ def deprecators
     #         bar:
     #           qux: 2
     #
+    # <code></code>
+    #
     #     # development environment
     #     Rails.application.config_for(:example)[:foo][:bar]
     #     # => { baz: 1, qux: 2 }