test_name: test_print_null
test_filename: test_output_format.py
docstring:
  Tests the default display of `NULL` in the output of `mf query`.
---
row    row__str_value    row__int_value    row__float_value    row__decimal_value    row__description      demo_metric
-----  ----------------  ----------------  ------------------  --------------------  ------------------  -------------
                                                                                     Each type as NULL.              1
