Merge pull request rust-lang#20899 from A4-Tacks/ide-comp-test-track

minor: fix track_caller for ide-complpetion test utils

Author: ChayimFriedman2

src/tools/rust-analyzer/crates/ide-completion/src/tests.rs

@@ -246,11 +246,10 @@ pub(crate) fn check_edit_with_config(
     let (db, position) = position(ra_fixture_before);
     let completions: Vec<CompletionItem> =
         hir::attach_db(&db, || crate::completions(&db, &config, position, None).unwrap());
-    let (completion,) = completions
-        .iter()
-        .filter(|it| it.lookup() == what)
-        .collect_tuple()
-        .unwrap_or_else(|| panic!("can't find {what:?} completion in {completions:#?}"));
+    let Some((completion,)) = completions.iter().filter(|it| it.lookup() == what).collect_tuple()
+    else {
+        panic!("can't find {what:?} completion in {completions:#?}")
+    };
     let mut actual = db.file_text(position.file_id).text(&db).to_string();
 
     let mut combined_edit = completion.text_edit.clone();