Technically, CGI.pm also is cross-platform, that is, it uses the correct CRLF (newline) sequence that is needed for the browser to parse them, on all platforms. As many have pointed out, this is usually a non-issue, as most (modern) web servers correct such things on the fly, before sending the response, but it doesn't hurt in case someone, for some reason, would run your program under one that doesn't. :)

---

You have moved into a dark place.
It is pitch black. You are likely to be eaten by a grue.