Vaclav Petras fd86f50e9a Apply Black to tests (#1387) 3 lat temu
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test_a_b_coeff.py fd86f50e9a Apply Black to tests (#1387) 3 lat temu
test_integer_rounding.py fd86f50e9a Apply Black to tests (#1387) 3 lat temu
test_nulls.py fd86f50e9a Apply Black to tests (#1387) 3 lat temu
test_small_data.py fd86f50e9a Apply Black to tests (#1387) 3 lat temu