src/vs/workbench/contrib/notebook/browser/diff/diffElementViewModel.ts/DiffElementViewModelBase/getComputedCellContainerWidth
class DiffElementViewModelBase:	getComputedCellContainerWidth(layoutInfo: NotebookLayoutInfo, diffEditor: boolean, fullWidth: boolean) {
		if (fullWidth) {
			return layoutInfo.width - 2 * DIFF_CELL_MARGIN + (diffEditor ? DiffEditorWidget.ENTIRE_DIFF_OVERVIEW_WIDTH : 0) - 2;
		}

		return (layoutInfo.width - 2 * DIFF_CELL_MARGIN + (diffEditor ? DiffEditorWidget.ENTIRE_DIFF_OVERVIEW_WIDTH : 0)) / 2 - 18 - 2;
	}