A misprint in the "Big data? 🤗 Datasets to the rescue!" chapter of the NLP Course?

[TopCoder2K]

There is the following code in the "The magic of memory mapping" section:

print(f"Number of files in dataset : {pubmed_dataset.dataset_size}")
size_gb = pubmed_dataset.dataset_size / (1024**3)
print(f"Dataset size (cache file) : {size_gb:.2f} GB")

It seems there should be "Number of bytes in dataset" instead of "Number of files in dataset", since the number of rows is 15 518 009 and dividing pubmed_dataset.dataset_size by 1024**3 suggests measuring information rather than the number of files.