src/vs/workbench/browser/parts/editor/textEditor.ts/BaseTextEditor/getConfigurationOverrides
class BaseTextEditor:	protected getConfigurationOverrides(): ICodeEditorOptions {
		return {
			overviewRulerLanes: 3,
			lineNumbersMinChars: 3,
			fixedOverflowWidgets: true,
			readOnly: this.input?.hasCapability(EditorInputCapabilities.Readonly),
			// render problems even in readonly editors
			// https://github.com/microsoft/vscode/issues/89057
			renderValidationDecorations: 'on'
		};
	}