Symfony version(s) affected: 3.4.15
PHP 7.2

Description

Unable to reverse value for property path "foo": The number contains unrecognized characters: "."
when valeu equal '239.' or other string contains number with dot in end.
It was happend in class Symfony\Component\Form\Extension\Core\DataTransformer\NumberToLocalizedStringTransformer when call method reverseTransform

How to reproduce

1. Create form like this

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('foo', NumberType::class, ['required' => false]);
    }

2. submit values and check valid

$form->submit([
    'foo' => '239.'
]);
if (!$form->isValid()){
    echo 'form is not valid';
}

OR

$transformer = NumberToLocalizedStringTransformer();
$transformer->reverseTransform('239.');

Possible Solution

Additional context