fix documentation indentation

[codecov[bot]]

Codecov Report

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

Project coverage is 99.55%. Comparing base (d68313b) to head (e275235).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #345 +/- ## ========================================== + Coverage 99.53% 99.55% +0.02% ========================================== Files 19 19 Lines 3842 3842 ========================================== + Hits 3824 3825 +1 + Misses 18 17 -1 ```

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