Fix Coq output of mutually-defined inductive predicates.
Fix Coq output of mutually-defined inductive predicates.

douglas-larocca/why3,ssaavedra/why3,douglas-larocca/why3,jpdeplaix/why3,douglas-larocca/why3,ssaavedra/why3,jpdeplaix/why3,ssaavedra/why3,jpdeplaix/why3