message: Fix rustfmt errors about method chain format
diff: @@ -193,7 +193,9 @@ fn from_radix_digits_be(v: &[u8], radix: u32) -> BigUint {
  let i = if r == 0 { power } else { r };
  let (head, tail) = v.split_at(i);
  - let first = head.iter().fold(0, |acc, &d| acc * radix + BigDigit::from(d));
  + let first = head
  + .iter()
  + .fold(0, |acc, &d| acc * radix + BigDigit::from(d));
  data.push(first);
  debug_assert!(tail.len() % power == 0);
  @@ -208,7 +210,9 @@ fn from_radix_digits_be(v: &[u8], radix: u32) -> BigUint {
  }
  debug_assert!(carry == 0);
  - let n = chunk.iter().fold(0, |acc, &d| acc * radix + BigDigit::from(d));
  + let n = chunk
  + .iter()
  + .fold(0, |acc, &d| acc * radix + BigDigit::from(d));
  add2(&mut data, &[n]);
  }
  