src/vs/editor/contrib/wordPartOperations/browser/wordPartOperations.ts/DeleteWordPartLeft/_delete
class DeleteWordPartLeft:	protected _delete(ctx: DeleteWordContext, wordNavigationType: WordNavigationType): Range {
		let r = WordPartOperations.deleteWordPartLeft(ctx);
		if (r) {
			return r;
		}
		return new Range(1, 1, 1, 1);
	}