Added some tests to make more robust the tactique "Functional Induction". Namely: check that the given function is a really a constant, and check that the number of given argument is exactly the arity of the given function.
Added some tests to make more robust the tactique "Functional
Induction". Namely: check that the given function is a really a
constant, and check that the number of given argument is exactly the
arity of the given function.


git-svn-id: a49b465eaba45b67e2e1e4e0b2c256a71f59fecb@3723 85f007b7-540e-0410-9357-904b9bb8a0f7

SamB/coq