cat: write_nonprint_to_end: be more explicit about printing '?'
@@ -588,10 +588,10 @@ fn write_nonprint_to_end<W: Write>(in_buf: &[u8], writer: &mut W, tab: &[u8]) ->
9 => writer.write_all(tab),
0..=8 | 10..=31 => writer.write_all(&[b'^', byte + 64]),
32..=126 => writer.write_all(&[byte]),
- 127 => writer.write_all(&[b'^', byte - 64]),
+ 127 => writer.write_all(&[b'^', b'?']),
128..=159 => writer.write_all(&[b'M', b'-', b'^', byte - 64]),
160..=254 => writer.write_all(&[b'M', b'-', byte - 128]),
- _ => writer.write_all(&[b'M', b'-', b'^', 63]),
+ _ => writer.write_all(&[b'M', b'-', b'^', b'?']),
}
.unwrap();
count += 1;
