tr: enable passing -d multiple times

src/uu/tr/src/tr.rs

@@ -179,7 +179,8 @@ pub fn uu_app() -> Command {
                 .short('d')
                 .long(options::DELETE)
                 .help("delete characters in SET1, do not translate")
-                .action(ArgAction::SetTrue),
+                .action(ArgAction::SetTrue)
+                .overrides_with(options::DELETE),
         )
         .arg(
             Arg::new(options::SQUEEZE)

tests/by-util/test_tr.rs

@@ -46,6 +46,32 @@ fn test_delete() {
         .stdout_is("BD");
 }
 
+#[test]
+fn test_delete_afterwards_is_not_flag() {
+    new_ucmd!()
+        .args(&["a-z", "-d"])
+        .pipe_in("aBcD")
+        .succeeds()
+        .stdout_is("-BdD");
+}
+
+#[test]
+fn test_delete_multi() {
+    new_ucmd!()
+        .args(&["-d", "-d", "a-z"])
+        .pipe_in("aBcD")
+        .succeeds()
+        .stdout_is("BD");
+}
+
+#[test]
+fn test_delete_late() {
+    new_ucmd!()
+        .args(&["-d", "a-z", "-d"])
+        .fails()
+        .stderr_contains("extra operand '-d'");
+}
+
 #[test]
 fn test_delete_complement() {
     new_ucmd!()