Hi,

> You can use Module#include, Module#append_features(module_or_class),
> for such use.

It's a mistake.  aModule.append_features(aClass) is same as
aClass.extend(aModule).  Sorry.
--
sorry for my buggy english
best regards
Kazuhiro HIWADA (hiwada / kuee.kyoto-u.ac.jp)