Add docstring & test for mdraw_est_markers (#88, #89)

[codecov[bot]]

Codecov Report

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

Comparison is base (794f491) 88.62% compared to head (1268b32) 89.36%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## mplot #92 +/- ## ========================================== + Coverage 88.62% 89.36% +0.74% ========================================== Files 16 16 Lines 1345 1354 +9 ========================================== + Hits 1192 1210 +18 + Misses 153 144 -9 ```

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[sonarcloud[bot]]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

2 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud