merged to allow recursive inspect (and to_s) for OpenStruct.
  [ruby-core:05532]

* lib/observer.rb: a patch from nornagon <nornagon@gmail.com>
  merged to allow arbitrary names for update methods.
  [ruby-core:05416]

* eval.c (rb_f_fcall): new method to avoid inefficiency of
  obj.instance_eval{send(...)} tricks.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9081 b2dd03c8-39d4-4d8f-98ff-823fe69b080e