update ActiveModel::Callbacks documentation [ci skip]

1 files changed, 26 insertions, 24 deletions

diff --git a/activemodel/lib/active_model/callbacks.rb b/activemodel/lib/active_model/callbacks.rb
index ebb4b51aa3..b8ba1a0a52 100644
--- a/activemodel/lib/active_model/callbacks.rb
+++ b/activemodel/lib/active_model/callbacks.rb
@@ -6,7 +6,7 @@ module ActiveModel
   # Provides an interface for any class to have Active Record like callbacks.
   #
   # Like the Active Record methods, the callback chain is aborted as soon as
-  # one of the methods in the chain returns false.
+  # one of the methods in the chain returns +false+.
   #
   # First, extend ActiveModel::Callbacks from the class you are creating:
   #
@@ -18,9 +18,10 @@ module ActiveModel
   #
   #   define_model_callbacks :create, :update
   #
-  # This will provide all three standard callbacks (before, around and after) for
-  # both the :create and :update methods. To implement, you need to wrap the methods
-  # you want callbacks on in a block so that the callbacks get a chance to fire:
+  # This will provide all three standard callbacks (before, around and after)
+  # for both the <tt>:create</tt> and <tt>:update</tt> methods. To implement,
+  # you need to wrap the methods you want callbacks on in a block so that the
+  # callbacks get a chance to fire:
   #
   #   def create
   #     run_callbacks :create do
@@ -28,8 +29,8 @@ module ActiveModel
   #     end
   #   end
   #
-  # Then in your class, you can use the +before_create+, +after_create+ and +around_create+
-  # methods, just as you would in an Active Record module.
+  # Then in your class, you can use the +before_create+, +after_create+ and
+  # +around_create+ methods, just as you would in an Active Record module.
   #
   #   before_create :action_before_create
   #
@@ -38,12 +39,12 @@ module ActiveModel
   #   end
   #
   # You can choose not to have all three callbacks by passing a hash to the
-  # define_model_callbacks method.
+  # +define_model_callbacks+ method.
   #
-  #   define_model_callbacks :create, :only => [:after, :before]
+  #   define_model_callbacks :create, only: [:after, :before]
   #
-  # Would only create the after_create and before_create callback methods in your
-  # class.
+  # Would only create the +after_create+ and +before_create+ callback methods in
+  # your class.
   module Callbacks
     def self.extended(base)
       base.class_eval do
@@ -51,25 +52,27 @@ module ActiveModel
       end
     end
 
-    # define_model_callbacks accepts the same options define_callbacks does, in case
-    # you want to overwrite a default. Besides that, it also accepts an :only option,
-    # where you can choose if you want all types (before, around or after) or just some.
+    # define_model_callbacks accepts the same options +define_callbacks+ does,
+    # in case you want to overwrite a default. Besides that, it also accepts an
+    # <tt>:only</tt> option, where you can choose if you want all types (before,
+    # around or after) or just some.
     #
-    #   define_model_callbacks :initializer, :only => :after
+    #   define_model_callbacks :initializer, only: :after
     #
-    # Note, the <tt>:only => <type></tt> hash will apply to all callbacks defined on
-    # that method call. To get around this you can call the define_model_callbacks
+    # Note, the <tt>only: <type></tt> hash will apply to all callbacks defined
+    # on that method call. To get around this you can call the define_model_callbacks
     # method as many times as you need.
     #
-    #   define_model_callbacks :create, :only => :after
-    #   define_model_callbacks :update, :only => :before
-    #   define_model_callbacks :destroy, :only => :around
+    #   define_model_callbacks :create,  only: :after
+    #   define_model_callbacks :update,  only: :before
+    #   define_model_callbacks :destroy, only: :around
     #
-    # Would create +after_create+, +before_update+ and +around_destroy+ methods only.
+    # Would create +after_create+, +before_update+ and +around_destroy+ methods
+    # only.
     #
-    # You can pass in a class to before_<type>, after_<type> and around_<type>, in which
-    # case the callback will call that class's <action>_<type> method passing the object
-    # that the callback is being called on.
+    # You can pass in a class to before_<type>, after_<type> and around_<type>,
+    # in which case the callback will call that class's <action>_<type> method
+    # passing the object that the callback is being called on.
     #
     #   class MyModel
     #     extend ActiveModel::Callbacks
@@ -83,7 +86,6 @@ module ActiveModel
     #       # obj is the MyModel instance that the callback is being called on
     #     end
     #   end
-    #
     def define_model_callbacks(*callbacks)
       options = callbacks.extract_options!
       options = {