Merge pull request #4314 from cakebaker/comm_total_with_output_delimiter

comm: use delimiter on "total" line

tests/by-util/test_comm.rs

@@ -71,6 +71,14 @@ fn total_with_suppressed_regular_output() {
         .stdout_is_fixture("ab_total_suppressed_regular_output.expected");
 }
 
+#[test]
+fn total_with_output_delimiter() {
+    new_ucmd!()
+        .args(&["--total", "--output-delimiter=word", "a", "b"])
+        .succeeds()
+        .stdout_is_fixture("ab_total_delimiter_word.expected");
+}
+
 #[test]
 fn output_delimiter() {
     new_ucmd!()