strip_forall : term -> term list * term

SYNOPSIS
Iteratively breaks apart universal quantifications.

DESCRIPTION
strip_forall `!x1 ... xn. t` returns ([`x1`;...;`xn`],`t`). Note that
   strip_forall(list_mk_forall([`x1`;...;`xn`],`t`))
will not return ([`x1`;...;`xn`],`t`) if t is a universal quantification.

FAILURE CONDITIONS
Never fails.

SEE ALSO
dest_forall, list_mk_forall.