fix: remove unused mutation for windows/clippy

Author: skjha98

src/uu/mv/src/mv.rs

@@ -732,31 +732,42 @@ fn rename(
                 return Ok(());
             }
             OverwriteMode::Interactive => {
-                let mut msg = translate!("mv-prompt-overwrite", "target" => to.quote());
-
-                #[cfg(unix)]
-                {
-                    use libc::mode_t;
-                    use std::os::unix::fs::PermissionsExt;
-
-                    if let Ok(meta) = fs::metadata(to) {
-                        let mode = meta.permissions().mode() & 0o777;
-
-                        // Check if the owner's write bit (0o200) is missing
-                        if (mode & 0o200) == 0 {
-                            let octal_mode = format!("{mode:04o}");
-                            // Prepend Zero-Width Non-Joiner (\u{200c}) to stop Fluent from formatting it as a number
-                            let mode_string = format!("\u{200c}{octal_mode}");
-
-                            msg = translate!(
-                                "mv-prompt-overriding-mode",
-                                "target" => to.quote(),
-                                "mode" => mode_string,
-                                "mode_str" => uucore::fs::display_permissions_unix(mode as mode_t, false)
-                            );
+                // We assign 'msg' the result of this block
+                let msg = {
+                    let default_msg = translate!("mv-prompt-overwrite", "target" => to.quote());
+
+                    #[cfg(unix)]
+                    {
+                        use libc::mode_t;
+                        use std::os::unix::fs::PermissionsExt;
+
+                        // We use an 'if let' as an expression here
+                        if let Ok(meta) = fs::metadata(to) {
+                            let mode = meta.permissions().mode() & 0o777;
+                            if (mode & 0o200) == 0 {
+                                let octal_mode = format!("{mode:04o}");
+                                let mode_string = format!("\u{200c}{octal_mode}");
+
+                                // This is the "return" value of the inner block
+                                translate!(
+                                    "mv-prompt-overriding-mode",
+                                    "target" => to.quote(),
+                                    "mode" => mode_string,
+                                    "mode_str" => uucore::fs::display_permissions_unix(mode as mode_t, false)
+                                )
+                            } else {
+                                default_msg
+                            }
+                        } else {
+                            default_msg
                         }
                     }
-                }
+
+                    #[cfg(not(unix))]
+                    {
+                        default_msg
+                    }
+                };
 
                 if !prompt_yes!("{}", msg) {
                     return Err(io::Error::other(""));