Use better testcase

tests/by-util/test_expand.rs

@@ -396,13 +396,16 @@ fn test_comma_with_plus_4() {
 #[test]
 fn test_args_override() {
  new_ucmd!()
- .args(&["-i", "-i", "alice_in_wonderland.txt"])
+ .args(&["-i", "-i", "with-trailing-tab.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",
+ "// !note: file contains significant whitespace
+// * indentation uses <TAB> characters
+int main() {
+ // * next line has both a leading & trailing tab
+ // with tabs=> 
+ return 0;
+}
+",
  );
 }