Unable to set pretty=false in FileSystemSink as it is hardcoded as true

[himynamesdave]

Currently cannot set the parameter pretty=false using FileSystemSink endpoints.

In that code path - Pretty is hardcoded

with io.open(file_path, mode='w', encoding=encoding) as f:
            fp_serialize(stix_obj, f, pretty=True, encoding=encoding, ensure_ascii=False)

cti-python-stix2/stix2/datastore/filesystem.py

Line 588 in 2743b90

fp_serialize(stix_obj, f, pretty=True, encoding=encoding, ensure_ascii=False)

Other endpoints support this parameter and it is not clear why it is not supported by FileSystemSink

Hence suggestion is to allow boolean variable for pretty for this endpoint.

[himynamesdave]

Also linking the relevant discussion on CTI TC Slack for reference:

https://cti-tc.slack.com/archives/C0DR1QMM3/p1667743171800879