Rational sequence

[Alastair Reid]

> Does this mean that we can safely enable USE_DOUBLE_PRECISION now?

Maybe.  It's so long since this was routinely used that bitrot has
probably set in.  It and our regression checks are probably good
enough that, once it compiles and passes checks again (assuming it
currently fails a few), I'd happily recommend it to people living
within sight of the bleeding edge.  I'm less confident that it's good
enough for all those people using Hugs for teaching.

I favour waiting until after the release and then making all the
things we want but aren't confident enough about be the default
behaviour so that anyone using the CVS will be testing it all the time
and then doing another release in 4-6 months with much cleanup.

--
Alastair