message: Fix clippy::write_with_newline
diff: @@ -107,7 +107,7 @@ fn pidigits(n: isize, out: &mut dyn io::Write) -> io::Result<()> {
  write!(out, "{}", d)?;
  if i % 10 == 0 {
  - write!(out, "\t:{}\n", i)?;
  + writeln!(out, "\t:{}", i)?;
  }
  context.eliminate_digit(d);
  @@ -118,7 +118,7 @@ fn pidigits(n: isize, out: &mut dyn io::Write) -> io::Result<()> {
  for _ in m..10 {
  write!(out, " ")?;
  }
  - write!(out, "\t:{}\n", n)?;
  + writeln!(out, "\t:{}", n)?;
  }
  Ok(())
  }
  