src/vs/editor/browser/widget/diffEditorWidget.ts/DiffEditorWidget/_adjustOptionsForLeftHandSide
class DiffEditorWidget:	private _adjustOptionsForLeftHandSide(options: Readonly<editorBrowser.IDiffEditorConstructionOptions>): IEditorConstructionOptions {
		const result = this._adjustOptionsForSubEditor(options);
		if (!this._options.renderSideBySide) {
			// never wrap hidden editor
			result.wordWrapOverride1 = 'off';
			result.wordWrapOverride2 = 'off';
		} else {
			result.wordWrapOverride1 = this._options.diffWordWrap;
		}
		if (options.originalAriaLabel) {
			result.ariaLabel = options.originalAriaLabel;
		}
		result.readOnly = !this._options.originalEditable;
		result.enableDropIntoEditor = !result.readOnly;
		result.extraEditorClassName = 'original-in-monaco-diff-editor';
		return {
			...result,
			dimension: {
				height: 0,
				width: 0
			}
		};
	}