Fix lint issues from external PR

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (347642b) 75.96% compared to head (955e3c5) 75.96%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #186 +/- ## ======================================= Coverage 75.96% 75.96% ======================================= Files 23 23 Lines 957 957 ======================================= Hits 727 727 Misses 230 230 ``` | Flag | Coverage Δ | | |---|---|---| | py38 | `75.96% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mozilla#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/mozilla/mozanalysis/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mozilla) | Coverage Δ | | |---|---|---| | [...c/mozanalysis/bayesian\_stats/bayesian\_bootstrap.py](https://app.codecov.io/gh/mozilla/mozanalysis/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mozilla#diff-c3JjL21vemFuYWx5c2lzL2JheWVzaWFuX3N0YXRzL2JheWVzaWFuX2Jvb3RzdHJhcC5weQ==) | `95.45% <100.00%> (ø)` | | | [src/mozanalysis/frequentist\_stats/bootstrap.py](https://app.codecov.io/gh/mozilla/mozanalysis/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=mozilla#diff-c3JjL21vemFuYWx5c2lzL2ZyZXF1ZW50aXN0X3N0YXRzL2Jvb3RzdHJhcC5weQ==) | `94.11% <100.00%> (ø)` | |

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