4 files changed, 16 insertions, 11 deletions
diff --git a/guides/source/4_0_release_notes.md b/guides/source/4_0_release_notes.md
index 1aaf5ebc94..84a65df2bc 100644
--- a/guides/source/4_0_release_notes.md
+++ b/guides/source/4_0_release_notes.md
@@ -229,11 +229,11 @@ Please refer to the [Changelog](https://github.com/rails/rails/blob/4-0-stable/a
       The method `change_table` is also reversible, as long as its block doesn't call `remove`, `change` or `change_default`
 
     * New method `reversible` makes it possible to specify code to be run when migrating up or down.
-      See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/migrations.md#using-the-reversible-method)
+      See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/active_record_migrations.md#using-reversible)
 
     * New method `revert` will revert a whole migration or the given block.
       If migrating down, the given migration / block is run normally.
-      See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/migrations.md#reverting-previous-migrations)
+      See the [Guide on Migration](https://github.com/rails/rails/blob/master/guides/source/active_record_migrations.md#reverting-previous-migrations)
 
 * Adds PostgreSQL array type support. Any datatype can be used to create an array column, with full migration and schema dumper support.
 
diff --git a/guides/source/action_mailer_basics.md b/guides/source/action_mailer_basics.md
index f981d0da47..f6c974c87a 100644
--- a/guides/source/action_mailer_basics.md
+++ b/guides/source/action_mailer_basics.md
@@ -298,8 +298,7 @@ Action Mailer 3.0 makes inline attachments, which involved a lot of hacking in p
     ```html+erb
     <p>Hello there, this is our image</p>
 
-    <%= image_tag attachments['image.jpg'].url, alt: 'My Photo',
-                                                class: 'photos' %>
+    <%= image_tag attachments['image.jpg'].url, alt: 'My Photo', class: 'photos' %>
     ```
 
 #### Sending Email To Multiple Recipients
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md
index c9e0fcd939..61490ceb54 100644
--- a/guides/source/association_basics.md
+++ b/guides/source/association_basics.md
@@ -756,7 +756,7 @@ class Order < ActiveRecord::Base
 end
 ```
 
-Each instance of the order model will have these methods:
+Each instance of the `Order` model will have these methods:
 
 ```ruby
 customer
@@ -1342,16 +1342,16 @@ class Customer < ActiveRecord::Base
 end
 ```
 
-Each instance of the customer model will have these methods:
+Each instance of the `Customer` model will have these methods:
 
 ```ruby
 orders(force_reload = false)
 orders<<(object, ...)
 orders.delete(object, ...)
 orders.destroy(object, ...)
-orders=objects
+orders=(objects)
 order_ids
-order_ids=ids
+order_ids=(ids)
 orders.clear
 orders.empty?
 orders.size
@@ -1831,16 +1831,16 @@ class Part < ActiveRecord::Base
 end
 ```
 
-Each instance of the part model will have these methods:
+Each instance of the `Part` model will have these methods:
 
 ```ruby
 assemblies(force_reload = false)
 assemblies<<(object, ...)
 assemblies.delete(object, ...)
 assemblies.destroy(object, ...)
-assemblies=objects
+assemblies=(objects)
 assembly_ids
-assembly_ids=ids
+assembly_ids=(ids)
 assemblies.clear
 assemblies.empty?
 assemblies.size
diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index 9ced77dfd7..16fa23c129 100644
--- a/guides/source/form_helpers.md
+++ b/guides/source/form_helpers.md
@@ -506,6 +506,12 @@ As the name implies, this only generates option tags. To generate a working sele
 <%= collection_select(:person, :city_id, City.all, :id, :name) %>
 ```
 
+As with other helpers, if you were to use the collection_select helper on a form builder scoped to the @person object, the syntax would be:
+
+```erb
+<%= f.collection_select(:city_id, City.all, :id, :name) %>
+```
+
 To recap, `options_from_collection_for_select` is to `collection_select` what `options_for_select` is to `select`.
 
 NOTE: Pairs passed to `options_for_select` should have the name first and the id second, however with `options_from_collection_for_select` the first argument is the value method and the second the text method.