Add syntactic coloring to some listings of the documentation.
Add syntactic coloring to some listings of the documentation.

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