There were 3 failures:
1) Symfony\Component\Form\Tests\Extension\Core\DataTransformer\NumberToLocalizedStringTransformerTest::testTransformWithGrouping with data set #0 (1234.5, '1.234,5', 'de_AT')
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-1.234,5
+1 234,5
/builddir/build/BUILDROOT/php-symfony-2.8.10-2.fc26.noarch/usr/share/php/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php:77
2) Symfony\Component\Form\Tests\Extension\Core\DataTransformer\NumberToLocalizedStringTransformerTest::testTransformWithGrouping with data set #1 (12345.912, '12.345,912', 'de_AT')
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-12.345,912
+12 345,912
/builddir/build/BUILDROOT/php-symfony-2.8.10-2.fc26.noarch/usr/share/php/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php:77
3) Symfony\Component\Form\Tests\Extension\Core\DataTransformer\NumberToLocalizedStringTransformerTest::testDecimalSeparatorMayNotBeDotIfGroupingSeparatorIsDotWithNoGroupSep
Failed asserting that exception of type "\Symfony\Component\Form\Exception\TransformationFailedException" is thrown.
ERRORS!
Tests: 3365, Assertions: 7536, Errors: 3, Failures: 3, Warnings: 1765, Skipped: 2, Incomplete: 12.