* lib/delegate.rb: split executable code into sample directory.
* sample/delegate.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46966 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/weakref.rb: split executable code into sample directory.
* sample/weakref.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46967 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* properties.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46968 b2dd03c8-39d4-4d8f-98ff-823fe69b080e