mv: allow dest with slash when using --update

tests/by-util/test_mv.rs

@@ -905,6 +905,20 @@ fn test_mv_update_option() {
     assert!(!at.file_exists(file_b));
 }
 
+#[test]
+fn test_mv_update_with_dest_ending_with_slash() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let source = "source";
+    let dest = "destination/";
+
+    at.mkdir("source");
+
+    ucmd.arg("--update").arg(source).arg(dest).succeeds();
+
+    assert!(!at.dir_exists(source));
+    assert!(at.dir_exists(dest));
+}
+
 #[test]
 fn test_mv_arg_update_none() {
     let (at, mut ucmd) = at_and_ucmd!();