object.c: Kernel#yield_self
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
object.c: Kernel#yield_self
receiver and returns the result.
[ruby-core:46320] [Feature #6721]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e