Implement Kernel#yield_self
Implement Kernel#yield_self

sgarciac/spec,ruby/rubyspec,eregon/rubyspec,ruby/spec,nobu/rubyspec,eregon/rubyspec,eregon/rubyspec,sgarciac/spec,nobu/rubyspec,ruby/spec,ruby/spec,nobu/rubyspec,ruby/rubyspec,sgarciac/spec