Ok, the last look.  Very minor adjustment. 
The optional arg of gdelete-neighbor-dups may be called '=', for the entry of gdelete uses calls so.

On Mon, Oct 26, 2015 at 2:10 AM, John Cowan <xxxxxx@mercury.ccil.org> wrote:
Unless there are additional comments or complaints, I'm ready to finalize
SRFI 121, Generators.  Please take a last look at draft #6 (currently
posted) and if possible at the code; I think they now correspond.

John Cowan          http://www.ccil.org/~cowan        xxxxxx@ccil.org
I suggest you solicit aid of my followers or learn the difficult art
of mud-breathing.  --Great-Souled Sam