Ruby

I did:

require 'pathname' module PathRefinement refine Pathname do def to_s '"%s"' % self end end end module Builder using PathRefinement def call(s,params) cmd = s % params puts cmd system(cmd) end module_function :call end file = Pathname($0).expand_path Builder.call("cat %s", file) 

I got:

C:\Users\Dominic E Sisneros\source\repos\ruby\refine_pathname>ruby system_refinement.rb cat C:/Users/Dominic E Sisneros/source/repos/ruby/refine_pathname/system_refinement.rb cat: 'C:/Users/Dominic': No such file or directory cat: E: No such file or directory cat: Sisneros/source/repos/ruby/refine_pathname/system_refinement.rb: No such file or directory 

I expected:

cat \"C:/Users/Dominic E Sisneros/source/repos/ruby/refine_pathname/system_refinement.rb\" 

because format %s is supposed to call to_s.