@wip Dirty complete

lib/dynamoid/dirty.rb

@@ -84,7 +84,7 @@ def reload(*)
     # Returns +true+ if any attribute have unsaved changes, +false+ otherwise.
     #
     #   person.changed? # => false
-    #   person.name = 'bob'
+    #   person.name = 'Bob'
     #   person.changed? # => true
     #
     # @return [true|false]
@@ -118,10 +118,10 @@ def changes
 
     # Returns a hash of attributes that were changed before the model was saved.
     #
-    #   person.name # => "bob"
-    #   person.name = 'robert'
+    #   person.name # => "Bob"
+    #   person.name = 'Robert'
     #   person.save
-    #   person.previous_changes # => {"name" => ["bob", "robert"]}
+    #   person.previous_changes # => {"name" => ["Bob", "Robert"]}
     #
     # @return [ActiveSupport::HashWithIndifferentAccess]
     def previous_changes
@@ -131,9 +131,9 @@ def previous_changes
     # Returns a hash of the attributes with unsaved changes indicating their original
     # values like <tt>attr => original value</tt>.
     #
-    #   person.name # => "bob"
-    #   person.name = 'robert'
-    #   person.changed_attributes # => {"name" => "bob"}
+    #   person.name # => "Bob"
+    #   person.name = 'Robert'
+    #   person.changed_attributes # => {"name" => "Bob"}
     #
     # @return [ActiveSupport::HashWithIndifferentAccess]
     def changed_attributes
@@ -150,6 +150,8 @@ def changed_attributes
     # @api private
     # @param attr [Symbol] attribute name
     # @param options [Hash] conditions on +from+ and +to+ value (optional)
+    # @option options [Symbol] :from previous attribute value
+    # @option options [Symbol] :to current attribute value
     def attribute_changed?(attr, options = {})
       result = changes_include?(attr)
       result &&= options[:to] == __send__(attr) if options.key?(:to)