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                                            Jura Pintar

Unexpected number of non-zero distances when running `sc.pp.neighbors` with `transformer="pynndescent"`

Another point of comparison: Phenograph (as wrapped in `sc.external.tl.phenograph`) uses a self-exclusive kNN graph which it gets by passing `n_neighbors + 1` to `sklearn.neighbors.NearestNeighbors` and then removing the self-column ([cf.](https://github.com/dpeerlab/PhenoGraph/blob/72a3e624345f105727046a3e835d845d02014654/phenograph/core.py#L15)),...