Cars-assemble: fix tests failing due to floating point precision

[tasxatzial]

A simple fix for the issue described below:

https://forum.exercism.org/t/cant-solve-cars-assemble-because-of-floating-point-precision/9242

The current tests check if two double numbers x, y are equal, and as a result some of them are failing when the numbers aren't identical. Two possible solutions:

• Check if the two numbers are close enough using a check like abs(x-y)<epsilon.
• Truncate doubles to floats. This lowers the required precision required for the tests to pass.

This PR employs the second approach.

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[tasxatzial]

I've just realized that my PR introduces a small typo . I'll correct it when it's reopened.

[IsaacG]

Is this change intentional? The validate exercise step should fail here.

[tasxatzial]

That's the typo i'm talking about.

[tasxatzial]

@bobbicodes Do you have some time to review this one?

[bobbicodes]

Yeah I suppose this would fix a lot of problems with this exercise, which is not supposed to be a challenge, it should be simple at this point. I'll wait to merge it until the typo is fixed.

[tasxatzial]

It's ready. Thanks!