DCI with refine, short syntax

gistfile1.rb

2.0.0dev :001 > class Foo; end
 => nil 
2.0.0dev :002 > class Bar; end
 => nil 
2.0.0dev :003 > class Baz; end
 => nil
2.0.0dev :010 > module Runner
2.0.0dev :011?>   [Foo,Bar,Baz].each do |klass|
2.0.0dev :012 >       refine klass do
2.0.0dev :013 >         def run
2.0.0dev :014?>         puts "I am a runner"
2.0.0dev :015?>         end
2.0.0dev :016?>       end
2.0.0dev :017?>     end
2.0.0dev :018?>   end
 => [Foo, Bar, Baz] 
2.0.0dev :021 > using Runner
 => main 
2.0.0dev :022 > Foo.new.run
I am a runner
 => nil