Someone ran across something like the below and shared it with me:
> (system "x\0y")
system: contract violation
expected:
(or/c (and/c string? (lambda (s) (not (memv #\nul (string->list s)))))
(and/c bytes? (lambda (bs) (not (memv 0 (bytes->list bs))))))
given: "x\u0000y"
I can read it and I know what it says. BUT, I think for a casual novice
scripter who encounters this kind of message, it is difficult to scrutinize and
understand, especially when an English phrase -- say "a string or byte-string
without nul character" -- would have served just as well.
Is it okay if I change this and push a fix in 'systems.rkt'?
-- Matthias
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