Tiny documentation edits [ci skip]

activemodel/lib/active_model/serialization.rb

@@ -122,9 +122,9 @@ module ActiveModel
     #   user.notes = [note]
     #
     #   user.serializable_hash
-    #   #=> {"name" => "Napoleon"} 
+    #   # => {"name" => "Napoleon"}
     #   user.serializable_hash(include: { notes: { only: 'title' }})
-    #   #=> {"name" => "Napoleon", "notes" => [{"title"=>"Battle of Austerlitz"}]}
+    #   # => {"name" => "Napoleon", "notes" => [{"title"=>"Battle of Austerlitz"}]}
     def serializable_hash(options = nil)
       options ||= {}
 

guides/source/configuring.md

@@ -516,7 +516,8 @@ There are a number of settings available on `config.action_mailer`:
     config.action_mailer.show_previews = false
     ```
 
-* `config.action_mailer.deliver_later_queue_name`. specifies the queue name for mailers. By default this is `mailers`.
+* `config.action_mailer.deliver_later_queue_name` specifies the queue name for
+  mailers. By default this is `mailers`.
 
 ### Configuring Active Support
 

guides/source/getting_started.md

@@ -1240,7 +1240,9 @@ article we want to show the form back to the user.
 We reuse the `article_params` method that we defined earlier for the create
 action.
 
-TIP: It is not necessary to pass all the attributes to `update`. For example, if `@article.update(title: 'A new title')` were called, Rails would only update the `title` attribute, leaving all other attributes untouched.
+TIP: It is not necessary to pass all the attributes to `update`. For example,
+if `@article.update(title: 'A new title')` was called, Rails would only update
+the `title` attribute, leaving all other attributes untouched.
 
 Finally, we want to show a link to the `edit` action in the list of all the
 articles, so let's add that now to `app/views/articles/index.html.erb` to make