ls: Fix quoting for control characters in shell mode

src/uucore/src/lib/features/quoting_style.rs

@@ -318,9 +318,25 @@ fn escape_name_inner(name: &OsStr, style: &QuotingStyle, dirname: bool) -> Strin
         } => {
             let name = name.to_string_lossy();
 
-            // Take ':' in account only if we are quoting a dirname
+            let escaped_chars = [
+                ':',
+                // Before this line, characters only induce quoting in the
+                // context of displaying a directory name.
+                // (e.g. with the recursive flag)
+                '"', '`', '$', '\\',
+                // After this line, characters induce quoting only if control
+                // characters are shown.
+                '\n',
+            ];
+
             let strt_index = if dirname { 0 } else { 1 };
-            let (quotes, must_quote) = if name.contains(&[':', '"', '`', '$', '\\'][strt_index..]) {
+            let end_index = if *show_control {
+                escaped_chars.len()
+            } else {
+                escaped_chars.len() - 1
+            };
+
+            let (quotes, must_quote) = if name.contains(&escaped_chars[strt_index..end_index]) {
                 (Quotes::Single, true)
             } else if name.contains('\'') {
                 (Quotes::Double, true)