Function join_strs

cloud-hypervisor/src/bin/ch-remote.rs:1221–1227

(mut acc: String, next: String)

        // Helper to join strings with a newline.
        #[allow(clippy::needless_pass_by_value)]
        fn join_strs(mut acc: String, next: String) -> String {
            if !acc.is_empty() {
                acc.push('\n');
            }
            acc.push_str(&next);
            acc
        }

        // This function helps to modify the Display representation of remote
        // API failures so that it aligns with the regular output of error