- I aligned the names of the tokens in common with Ligodity.
- I removed the "down" and "step" clauses in loops.
- Note: the stratification of the rule "pattern" in the
previous commit has the pleasant effect to remove a call
to "corner_case" in function "simpl_case" of the
file "2-simplify/pascaligo.ml".
- Added more cases to the pretty-printer of the AST.