[Validator] NoSuspiciousCharacters custom error messages fix

[bam1to]

Q	A
Branch?	6.3 for bug fixes
Bug fix?	yes
New feature?	no
Deprecations?	no
Tickets	Fix #51715
License	MIT
Doc PR

We use the ?? operator to check if the entered constructor arguments are equal to null. The previous operator (??=) was incorrect because of the default messages' values.

[carsonbot]

Hey!

I see that this is your first PR. That is great! Welcome!

Symfony has a contribution guide which I suggest you to read.

In short:

• Always add tests
• Keep backward compatibility (see https://symfony.com/bc).
• Bug fixes must be submitted against the lowest maintained branch where they apply (see https://symfony.com/releases)
• Features and deprecations must be submitted against the 6.4 branch.

Review the GitHub status checks of your pull request and try to solve the reported issues. If some tests are failing, try to see if they are failing because of this change.

When two Symfony core team members approve this change, it will be merged and you will become an official Symfony contributor!
If this PR is merged in a lower version branch, it will be merged up to all maintained branches within a few days.

I am going to sit back now and wait for the reviews.

Cheers!

Carsonbot

[carsonbot]

Hey!

Thanks for your PR. You are targeting branch "6.4" but it seems your PR description refers to branch "6.3 for bug fixes".
Could you update the PR description or change target branch? This helps core maintainers a lot.

Cheers!

Carsonbot

[derrabus]

Thank you. Can you provide a test for this issue?

[nicolas-grekas]

Thank you @bam1to.