Misc fixes

[skirpichev]

• d57f46f Amend 7a40966 (filter warning)
• 83713ff Update copyright
• d50b182 Cleanup docs/conf.py

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (831782a) 85.51% compared to head (d50b182) 85.51%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #461 +/- ## ======================================= Coverage 85.51% 85.51% ======================================= Files 49 49 Lines 11690 11690 Branches 2211 2211 ======================================= Hits 9997 9997 Misses 1693 1693 ```

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[casevh]

Thanks.