simplify trim() function

[codecov[bot]]

Codecov Report

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

Project coverage is 98.97%. Comparing base (2977af5) to head (82e3f37). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #727 +/- ## ========================================== - Coverage 98.97% 98.97% -0.01% ========================================== Files 21 21 Lines 3501 3499 -2 ========================================== - Hits 3465 3463 -2 Misses 36 36 ```

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