code: def test_first_linebreak_multiline_on_linewidth(self):
      # First line is one character longer than previous test
      p = poly.Polynomial(
          [12345678, 12345678, 12345678, 12345678.12, 1, 12345678]
      )
      assert_equal(
          str(p),
          (
              "12345678.0 + 12345678.0 x + 12345678.0 x**2 + "
              "12345678.12 x**3 +\n1.0 x**4 + 12345678.0 x**5"
          ),
      )
  
imports: from math import nan, inf
  import pytest
  from numpy._core import array, arange, printoptions
  import numpy.polynomial
  from numpy.testing import assert_equal, assert_
  from fractions import Fraction
  from decimal import Decimal
label_desc: Use image node_id 5 for calling the TestLinebreaking obj's underlying member method code with example usage: obj.test_first_linebreak_multiline_on_linewidth() without return types