[Chicken-users] Where is parenthesis-synonyms gone?

[Paul Colby]

Hi,

I'm trying to do some algebra using scheme so I would like to disable the 
parenthesis-synonyms so
I may give [] and {} different meanings. I'm running version 4.7.0. In the 
documentation on 
"parameters" I was lead to believe that one might disable this feature of the 
reader by 
(parenthesis-synonyms #f). Every symbol in the parameters documentation is 
there except 
parenthesis-synonyms. Is there a reason this has dropped off the symbol table? 
I tried "apropos"
and parenthesis-synonyms is a symbol just not bound to anything.

Thanks
Paul C.