Fixing a warning is not removing the curly line

[Terbium-135]

Fixing a warning (editing therr into three) in the (Zed) editor is not removing the curly, yellow line line.
Not sure if this matters but the warning has been issued by the elixir type system.

[mhanberg]

This was most likely related to #59 and should be fixed by #205.

Please open a new issue if you see this again.