You need to add
indentUnit.of(" ")(four space, which the forum seems to collapse) from@codemirror/languageto your configuration.
Does “add to my configuration” mean add another extension to my EditorStateConfig?
If so, where do I get indentUnit from? Do I import it from somewhere?
Some places I have tried to find it:
import {Indentation} from '@codemirror/language'
Indentation.indentUnit
import {LanguageDescription} from '@codemirror/language'
LanguageDescription.indentUnit