✏️ Rethink last iemapp change for allowed_as_list

[akrherz]

redo what #958 did

[deepsource-io[bot]]

Here's the code health analysis summary for commits eb27050..e75d388. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Python	✅ Success		View Check ↗

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[codecov[bot]]

Codecov Report

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

Project coverage is 98.44%. Comparing base (eb27050) to head (e75d388). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #959 +/- ## ======================================= Coverage 98.44% 98.44% ======================================= Files 80 80 Lines 9845 9848 +3 ======================================= + Hits 9692 9695 +3 Misses 153 153 ```

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