fn batch_normalize_generic(
points: &[EdwardsPoint],
zs: &mut [FieldElement],
scratch: &mut [FieldElement],
out: &mut [AffinePoint],
)fn batch_normalize_generic(
points: &[EdwardsPoint],
zs: &mut [FieldElement],
scratch: &mut [FieldElement],
out: &mut [AffinePoint],
)