src/vs/editor/contrib/wordOperations/wordOperations.ts/DeleteWordLeftCommand/_delete
class DeleteWordLeftCommand:	protected _delete(ctx: DeleteWordContext, wordNavigationType: WordNavigationType): Range {
		let r = WordOperations.deleteWordLeft(ctx, wordNavigationType);
		if (r) {
			return r;
		}
		return new Range(1, 1, 1, 1);
	}