Avoid frenglish in documentation. Improve examples of why3session output.
Avoid frenglish in documentation. Improve examples of why3session output.

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