Taylor R. Campbell scripsit:

>            String-set! returns a string whose elements the same (in the
>            sense of eqv?) as those in STRING, with the exception of element
>            K, which is instead the same as CHAR.  String-set! may or may
>            not return a string which is the same as STRING, but must not
>            side-effect STRING.
>
> (I think you probably meant to strike the exclamation mark from the
> name.)

Yes.  Alternatively, the ! could be kept in the sense of SRFI-1, and then
the "must not" would be changed to "may or may not".  This would provide
immutable strings as an implementation option.

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