fix duplicate flags

src/uu/expand/src/expand.rs

@@ -275,6 +275,7 @@ pub fn uu_app() -> Command {
  .after_help(LONG_HELP)
  .override_usage(format_usage(USAGE))
  .infer_long_args(true)
+ .args_override_self(true)
  .arg(
  Arg::new(options::INITIAL)
  .long(options::INITIAL)

tests/by-util/test_expand.rs

@@ -392,3 +392,17 @@ fn test_comma_with_plus_4() {
  // 01234567890
  .stdout_is("a b c");
 }
+
+#[test]
+fn test_args_override() {
+ new_ucmd!()
+ .args(&["-i", "-i", "alice_in_wonderland.txt"])
+ .run()
+ .stdout_is(
+ "Alice was beginning to get very tired of sitting by\n\
+ her sister on the bank, and of having nothing to do: once or twice\n\
+ she had peeped into the book her sister was reading, but it had no\n\
+ pictures or conversations in it, \"and what is the use of a book,\"\n\
+ thought Alice \"without pictures or conversation?\"\n",
+ );
+}

tests/fixtures/expand/alice_in_wonderland.txt

@@ -0,0 +1,5 @@
+Alice was beginning to get very tired of sitting by
+her sister on the bank, and of having nothing to do: once or twice
+she had peeped into the book her sister was reading, but it had no
+pictures or conversations in it, "and what is the use of a book,"
+thought Alice "without pictures or conversation?"