From: Motohiro KOSAKI <redmine@...>
Date: 2011-02-14T18:12:28+09:00
Subject: [ruby-core:35228] [Ruby 1.9-Bug#4396] windows commands starting with "@" should run at all even though command string is quoted by `"'.

Issue #4396 has been updated by Motohiro KOSAKI.


If you are writing C and you need to run "@echo" command, you should escape the string by `^' (caret). 

ie, 
------------------------------------
main()
{
  system("^@echo foo");
}

------------------------------------

It's MSVCRT spec. I'm not sure ruby's system() method should follow it or not.
Maybe we need a discussion.
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http://redmine.ruby-lang.org/issues/show/4396

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