gh-144173: fix flaky test_complex.test_truediv() #144355
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Previously, component-wise relative error bound was tested. However, such bound can't exist already for complex multiplication as one can be used to perform subtraction of floating-point numbers, e.g. x and y for z0=1+1j and z1=x+yj. ```pycon >>> x, y = 1e-9+1j, 1+1j >>> a = x*y*y.conjugate()/2;a (1.0000000272292198e-09+1j) >>> b = x*(y*y.conjugate()/2);b (1e-09+1j) >>> b == x True >>> (a.real-b.real)/math.ulp(b.real) 131672427.0 ```
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CC @tim-one |
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Previously, component-wise relative error bound was tested. However, such bound can't exist already for complex multiplication as one can be used to perform subtraction of floating-point numbers, e.g. x and y for z0=1+1j and z1=x+yj.