style: fix lint

Author: vkarpov15

lib/model.js

@@ -700,14 +700,14 @@ Model.prototype.$__where = function _where(where) {
  *
  *     await product.deleteOne();
  *     await Product.findById(product._id); // null
- * 
+ *
  * Since `deleteOne()` returns a Query, the `deleteOne()` will **not** execute unless you use either `await`, `.then()`, `.catch()`, or [`.exec()`](https://mongoosejs.com/docs/api/query.html#Query.prototype.exec())
  *
  * #### Example:
- * 
+ *
  *     product.deleteOne(); // Doesn't do anything
  *     product.deleteOne().exec(); // Deletes the document, returns a promise
- * 
+ *
  * @return {Query} Query
  * @api public
  */