better comments

Author: TheIronBorn

src/bigrand.rs

@@ -43,8 +43,9 @@ impl<R: Rng + ?Sized> RandBigInt for R {
         let mut data = vec![BigDigit::default(); digits + (rem > 0) as usize];
         // `fill_bytes` is faster than many `gen::<u32>` calls
         self.fill_bytes(data[..].as_byte_slice_mut());
-        // per the `Rng::fill` source, might be unnecessary if
-        // reproducibility across architectures is not desired
+        // Swap bytes per the `Rng::fill` source. This might be
+        // unnecessary if reproducibility across architectures is not
+        // desired.
         data.to_le();
         if rem > 0 {
             data[digits] >>= BITS - rem;