From 3bbfe00791b7874bb9e94bcf37e5c068f836a451 Mon Sep 17 00:00:00 2001
From: Michael Lohmann <mi.al.lohmann@gmail.com>
Date: Tue, 1 Feb 2022 22:16:05 +0100
Subject: [PATCH] cat: write_nonprint_to_end: be more explicit about printing
 '?'

---
 src/uu/cat/src/cat.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/uu/cat/src/cat.rs b/src/uu/cat/src/cat.rs
index e0e6ed7f0..498e5e8ad 100644
--- a/src/uu/cat/src/cat.rs
+++ b/src/uu/cat/src/cat.rs
@@ -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;