Fix Php80Test::testFdiv()

[WinterSilence]

Need using $this->assertEqualsWithDelta() to compare float values.
Why not use $this->assertEquals() or $this->assertSame()? Because (0.1 * 0.1) / 0.1 not equal 0.1, it's ~0.10000000000000002

[nicolas-grekas]

This reminds me symfony/symfony#45475
This happens since sebastianbergmann/phpunit#4874

/cc @sebastianbergmann is that legit?

[WinterSilence]

@nicolas-grekas no)) assertEqualsWithDelta() added specially for same cases in PhpUnit long time ago

[WinterSilence]

@nicolas-grekas your question to Sebastian is incorrect: this package use PhpUnit 5-6, sebastianbergmann/phpunit#4874 is PhpUnit 8

[nicolas-grekas]

This PR is definitely motivated by sebastianbergmann/phpunit#4874
The CI is currently green on versions that don't have that patch, and red on jobs that use recent PHPUnit versions.

[nicolas-grekas]

Issue fixed in a932445
Thanks for submitting.

[WinterSilence]

@nicolas-grekas this PR motivated by https://github.com/symfony/polyfill/runs/5367868196?check_suite_focus=true
I'm don't see before sebastianbergmann/phpunit#4874
It's not fixed it's f..n shame

[nicolas-grekas]

It's not fixed it's f..n shame

what do you mean? yes it is, see newest CI runs as a proof.

[WinterSilence]

@nicolas-grekas this PR too do this, but you close it and update test data instead using correct assertion.

[nicolas-grekas]

This PR works around the test data, which was wrong in the first place. We want an exact check, not an approximation here.

[WinterSilence]

@nicolas-grekas sorry, my fail