[R6RS] `syntax-rules' presentation

[dyb at cs.indiana.edu]

> I suppose the most economic way to describe syntax-rules would be to
> list the macro that defines it in terms of syntax-case.  However, this
> means a reader needs to read through the description of syntax-case
> before being able to syntax-rules, so I'm in favor of having an
> independent description.  If we do that, is the best way to go about
> doing it to try to pimp up the R5RS chapter or instead to perform a
> massacre on a copy of the syntax-case chapter?

An independent description is fine.  I think it's probably easist to trim
down the syntax-case chapter.

Kent