read() returns incomplete file? (not clear on documentation)

Hello,

This is my first time using the library, so please apologize me if I'm missing something obvious.

I'm trying to read a .csv.gz file (quite small, less than 100kb) following the documentation (https://gcsfs.readthedocs.io/en/latest/#examples), by doing:

fs = gcsfs.GCSFileSystem(project=project_id, token=service_key_path)
uri = bucket_name + '/' + filename
with fs.open(uri, 'rb') as f:
    content = f.read()

Here, I expect content to have the entire file, but it has only 168 rows (out of 946 in total). Reading the same file with google-cloud-storage works fine.

storage_client = storage.Client(credentials=credentials, project=project_id)
bucket = storage_client.bucket(bucket_name)
blob = bucket.blob(filename)
content = blob.download_as_string()

What am I missing?
Thanks

Start with the documented gcsfs example and the fs.open(..., 'rb').read() entry point described in the report, then compare its result with google-cloud-storage's download_as_string(). Reproduce the .csv.gz case and determine whether the incomplete content is a library bug or a documentation issue; done means the cause and expected behavior are established and covered by a clear fix or documentation update.