message: [fix] Fn -> FnOnce
diff: @@ -64,7 +64,7 @@ fn refill<TScorer: Scorer, TScoreCombiner: ScoreCombiner>(
  impl<TScorer: Scorer, TScoreCombiner: ScoreCombiner> Union<TScorer, TScoreCombiner> {
  pub(crate) fn build(
  docsets: Vec<TScorer>,
  - score_combiner_fn: impl Fn() -> TScoreCombiner,
  + score_combiner_fn: impl FnOnce() -> TScoreCombiner,
  ) -> Union<TScorer, TScoreCombiner> {
  let non_empty_docsets: Vec<TScorer> = docsets
  .into_iter()
  