WP: no substitution of logic terms, but let-in instead
WP: no substitution of logic terms, but let-in instead

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