ext/extmk.rb: Shellwords.join

* ext/extmk.rb (system): use Shellwords.join.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35726 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/extmk.rb

@@ -56,7 +56,7 @@ def system(*args)
     if args.size == 1
       puts args
     else
-      puts args.map{|arg| Shellwords.escape(arg)}.join(' ')
+      puts Shellwords.join(args)
     end
   end
   super