Update Enumerable#chunk
Update Enumerable#chunk

Enumerable#chunk without block returns an Enumerator for itself
now.

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