[Bug 18346] cmd does not support the "^" escape character

http://bugs.winehq.org/show_bug.cgi?id=18346

--- Comment #8 from Dima Ryazanov   2010-01-12 13:49:11 ---
It's a SCons script that runs "cl", "link", "m4", etc. In this case, it needs
to run something like:

m4 -DURL=http://example.com/?a=1&b=2&c=3 ...

So we escape the ampersands with ^. I guess it's not any more complex than my
"echo a^&b" example.

The other bugs I've hit so far are:
bug 21338
bug 21344