Fixed few typos in tests and guide

activerecord/test/cases/associations/eager_test.rb

@@ -379,7 +379,7 @@ def test_loading_with_no_associations
   # Regression test for 21c75e5
   def test_nested_loading_does_not_raise_exception_when_association_does_not_exist
     assert_nothing_raised do
-      Post.all.merge!(includes: { author: :author_addresss }).find(posts(:authorless).id)
+      Post.all.merge!(includes: { author: :non_existing_association }).find(posts(:authorless).id)
     end
   end
 

activerecord/test/cases/delegated_type_test.rb

@@ -95,15 +95,15 @@ class DelegatedTypeTest < ActiveRecord::TestCase
   test "touch account" do
     previous_account_updated_at  = @entry_with_message.account.updated_at
     previous_entry_updated_at    = @entry_with_message.updated_at
-    previous_messsage_updated_at = @entry_with_message.entryable.updated_at
+    previous_message_updated_at  = @entry_with_message.entryable.updated_at
 
     travel 5.seconds do
       Recipient.create! message: @entry_with_message.entryable, email_address: "test@test.com"
     end
 
     assert_not_equal @entry_with_message.reload.account.updated_at, previous_account_updated_at
     assert_not_equal @entry_with_message.reload.updated_at, previous_entry_updated_at
-    assert_not_equal @entry_with_message.reload.entryable.updated_at, previous_messsage_updated_at
+    assert_not_equal @entry_with_message.reload.entryable.updated_at, previous_message_updated_at
   end
 
   test "builder method" do

guides/source/4_1_release_notes.md

@@ -507,7 +507,7 @@ for detailed changes.
 
 * Calling `update_attributes` will now throw an `ArgumentError` whenever it
   gets a `nil` argument. More specifically, it will throw an error if the
-  argument that it gets passed does not respond to to
+  argument that it gets passed does not respond to
   `stringify_keys`. ([Pull Request](https://github.com/rails/rails/pull/9860))
 
 * `CollectionAssociation#first`/`#last` (e.g. `has_many`) use a `LIMIT`ed