diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb
index 0d5a8e6f2517d5735983fcfa32d8a22b9a07cf02..ae78ceee01549c84dcef0ae13f77253f526efadb 100644
--- a/activerecord/lib/active_record/nested_attributes.rb
+++ b/activerecord/lib/active_record/nested_attributes.rb
@@ -195,15 +195,23 @@ class TooManyRecords < ActiveRecordError
     # Nested attributes for an associated collection can also be passed in
     # the form of a hash of hashes instead of an array of hashes:
     #
-    #   Member.create(name:             'joe',
-    #                 posts_attributes: { first:  { title: 'Foo' },
-    #                                     second: { title: 'Bar' } })
+    #   Member.create(
+    #     name: 'joe',
+    #     posts_attributes: {
+    #       first:  { title: 'Foo' },
+    #       second: { title: 'Bar' }
+    #     }
+    #   )
     #
     # has the same effect as
     #
-    #   Member.create(name:             'joe',
-    #                 posts_attributes: [ { title: 'Foo' },
-    #                                     { title: 'Bar' } ])
+    #   Member.create(
+    #     name: 'joe',
+    #     posts_attributes: [
+    #       { title: 'Foo' },
+    #       { title: 'Bar' }
+    #     ]
+    #   )
     #
     # The keys of the hash which is the value for +:posts_attributes+ are
     # ignored in this case.