message: Move isqrt tests to their own module
diff: @@ -46,6 +46,10 @@ impl Unsigned for u32 {}
  impl Unsigned for u64 {}
  impl Unsigned for u128 {}
  +#[cfg(test)]
  +mod tests {
  + use super::*;
  +
  #[test]
  fn isqrts() {
  // Let's check correctness.
  @@ -63,3 +67,4 @@ fn isqrts() {
  assert_eq!(26u64.isqrt(), 5);
  assert_eq!(26u128.isqrt(), 5);
  }
  +}
  