Update grammar_gen use of parlex::detail::builtins().longest.
Update grammar_gen use of parlex::detail::builtins().longest.

coder0xff/Plange,coder0xff/Plange,coder0xff/Plange,dlin172/Plange,dlin172/Plange,dlin172/Plange,coder0xff/Plange,dlin172/Plange