I said:
> > To be honest, I think we should treat x'x as an error in the sample
> > implementation (though guile treats x'x as a single symbol).  You can
> > always use |x'x| if you mean that, and if you mean (x 'x), we already
> > have several much clearer ways to express that:

On Fri, 6 Dec 2013 10:58:25 -0500, John Cowan <co...@mercury.ccil.org> wrote:
> +1

Okay, I've pushed that change, and it now reports more specifically what the 
problem is.
That means that x'y is no longer legal... and it will *immediately* identify 
that as an error
(and report the failing character, ' in this case).

This was never specified in SRFI-110 (or Scheme), so it's not a spec change...
it's just a way to more strict in a standards-compliant way.

--- David A. Wheeler

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