* ActiveSupport::Configurable should allow config_accessor to take
default value by block, just like cattr_accessor.
class User
include ActiveSupport::Configurable
config_accessor :hair_colors do
[:brown, :black, :blonde, :red]
end
end
User.hair_colors # => [:brown, :black, :blonde, :red]
* remove trailing whitespaces in configurable.rb and its test file.
* Update ActiveSupport CHANGELOG.
Changes:
* Add `instance_accessor` option to opt out of the instance writer and
instance reader methods.
* Raises a NameError if the name of the attribute is not valid.
* Update documentation and tests.
* Add CHANGELOG entry in activesupport.
