Re^3: The science fiction writer who most personifies Perl is:

[ww]

in reply to Re^2: The science fiction writer who most personifies Perl is:
in thread The science fiction writer who most personifies Perl is:

No, "s" is correct; there's a very obscurely implied ellipsis ("and so on"); previous node's blockquote is verbatim from site. We're looking at a substitution:

$o =~ s/./chr((ord($&)-13+$f*&e)%26+65)/eg;

See Bruce Schneier's Counterpane site, referenced by author's errata.