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[Scheme-reports] An R5RS erratum that persisted into R7RS

Per Richard Kelsey's R5RS errata at
<http://www.mumble.net/~kelsey/r5rs-errata.html>, the domain of `list-ref`
is off by one: `(list-ref x k)` is an error if x has k or fewer elements.
This is now on the R7RSSmallErrata page and in the "errata" branch.

John Cowan          http://www.ccil.org/~cowan        cowan@x
The Penguin shall hunt and devour all that is crufty, gnarly and
bogacious; all code which wriggles like spaghetti, or is infested with
blighting creatures, or is bound by grave and perilous Licences shall it
capture.  And in capturing shall it replicate, and in replicating shall
it document, and in documentation shall it bring freedom, serenity and
most cool froodiness to the earth and all who code therein.  --Gospel of Tux

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