iconvert and int8 pages report a incorrect maximum value of uint64
@mottelet)
Reported by Stéphane MOTTELET (iconvert:
itype = 18
return uint64 numbers in the range [0, 18446744073709551616]
int8:
y = uint64(X)
return numbers in the range [0, 18446744073709551616]
18446744073709551616 should be replaced by 2^64-1=18446744073709551615