fix: only strip trailing os error suffix

src/uucore/src/lib/mods/error.rs

@@ -479,9 +479,15 @@ impl Display for UIoError {
 /// ```
 pub fn strip_errno(err: &std::io::Error) -> String {
     let mut msg = err.to_string();
-    if let Some(pos) = msg.find(" (os error ") {
-        msg.truncate(pos);
+
+    if let Some((prefix, suffix)) = msg.rsplit_once(" (os error ")
+        && suffix
+            .strip_suffix(')')
+            .is_some_and(|n| n.parse::<u32>().is_ok())
+    {
+        msg.truncate(prefix.len());
     }
+
     msg
 }
 
@@ -797,6 +803,28 @@ impl Display for ClapErrorWrapper {
 
 #[cfg(test)]
 mod tests {
+    #[test]
+    fn test_strip_errno_removes_trailing_os_error() {
+        use super::strip_errno;
+        use std::io::Error;
+
+        let err = Error::from_raw_os_error(2);
+        assert_eq!(strip_errno(&err), "No such file or directory");
+    }
+
+    #[test]
+    fn strip_errno_preserves_nontrailing_os_error() {
+        use super::strip_errno;
+        use std::io::Error;
+
+        let err = Error::other(r#"Permission denied (os error 13) at path "/tmp.haKXBI6xNU""#);
+
+        assert_eq!(
+            strip_errno(&err),
+            r#"Permission denied (os error 13) at path "/tmp.haKXBI6xNU""#
+        );
+    }
+
     #[test]
     #[cfg(unix)]
     fn test_nix_error_conversion() {