CLN: tighten noqas
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [ ] whatsnew entry

@jreback docbuild is green here wow haven't seen green in a while
thxs! I think we should backport the doc fix? sure.  its just the one line More explicit, yes

On Mon, Nov 22, 2021 at 1:31 AM Joris Van den Bossche <
***@***.***> wrote:

> ***@***.**** commented on this pull request.
> ------------------------------
>
> In pandas/core/algorithms.py
> <https://github.com/pandas-dev/pandas/pull/44529#discussion_r754089648>:
>
> > @@ -1849,5 +1849,5 @@ def union_with_duplicates(lvals: ArrayLike, rvals: ArrayLike) -> ArrayLike:
>      unique_array = ensure_wrapped_if_datetimelike(unique_array)
>
>      for i, value in enumerate(unique_array):
> -        indexer += [i] * int(max(l_count[value], r_count[value]))
> +        indexer += [i] * int(max(l_count.at[value], r_count.at[value]))
>
> Same question as in the other PR: what's the reason for this change? It
> shouldn't influence behaviour, but just being more explicit about
> label-based?
>
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