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The 1-argument version of AC_INIT is obsolete since 2003. Moreover, it
prevents ./configure --version from giving a meaningful output.

counts lines/tokens in Why3 files
distinguishes spec (logic declarations and annotations) and code
reports the ratio spec/code with command line option -f

example: why3wc -f examples/*.mlw
see why3wc --help for more details

note: why3wc assumes that input files are lexically well-formed
it also makes some approximations (switching from spec to code and
conversely is only done when there is a blank line in the middle)

sudoku example now uses arrays only

support for 31/32/63/64-bit integers in extracted code

everything is contained in the driver (ocaml.drv)
with possible references to OCaml modules contained in why3extract.cma
(currently why3__Prelude, why3__BigInt, why3__Map)

(that is, using number of occurrences)
No more definition of permutation using inductive predicates.
Impacts array.ArrayPermut; proof sessions updated.
Coq realizations for map.Occ and map.MapPermut;
proof session for array.ArrayPermut in progress