iddiff: UnicodeDecodeError: 'utf-8' codec can't decode byte 0x92 in position 55320: invalid start byte

[sentry-io]

Sentry Issue: AUTHOR-TOOLS-32F

UnicodeDecodeError: 'utf-8' codec can't decode byte 0x92 in position 55320: invalid start byte
(6 additional frame(s) were not displayed)
...
  File "at/utils/authentication.py", line 37, in require_api_key
    return f(*args, **kwargs)
  File "at/utils/file.py", line 178, in check_file
    return f(*args, **kwargs)
  File "at/api.py", line 498, in id_diff
    iddiff = get_id_diff(old_draft=old_draft,
  File "at/utils/iddiff.py", line 64, in get_id_diff
    return output.stdout.decode('utf-8')