* 3.4:
  Update links to documentation
  [Validator] Add the missing translations for the Arabic (ar) locale
  ensure to expect no validation for the right reasons
  [PhpUnitBridge] Add test case for @expectedDeprecation annotation
  Update year in license files
  [Console][FormatterHelper] Use helper strlen statically and remove duplicated code
  Fix BC issue in phpDoc Reflection library
  [Translator] Performance improvement in MessageCatalogue and catalogue operations.

* 4.3:
  [Mailer] Remove line breaks in email attachment content
  Update links to documentation
  [Validator] Add the missing translations for the Arabic (ar) locale
  ensure to expect no validation for the right reasons
  [PhpUnitBridge] Add test case for @expectedDeprecation annotation
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove $testsWithWarnings stack
  [Mailer][MailchimpBridge] Fix missing attachments when sending via Mandrill API
  [Mailer][MailchimpBridge] Fix incorrect sender address when sender has name
  [HttpClient] fix capturing SSL certificates with NativeHttpClient
  [TwigBridge][Form] Added missing help messages in form themes
  Update year in license files
  Update year in license files
  [HttpClient] fix typo
  [Console][FormatterHelper] Use helper strlen statically and remove duplicated code
  [Routing] Fix i18n routing when the url contains the locale
  Fix BC issue in phpDoc Reflection library
  [Translator] Performance improvement in MessageCatalogue and catalogue operations.

* 3.4:
  chown and chgrp should also accept int as owner and group
  Fix RememberMe with null password
  [Validator] Fix plurals for sr_Latn (Serbian language written in latin script) validation messages
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove some unneeded code
  fix PHP const mapping keys using the inline notation
  Fix that no-cache requires positive validation with the origin, even for fresh responses

* 4.3:
  chown and chgrp should also accept int as owner and group
  Fix RememberMe with null password
  [Validator] Fix plurals for sr_Latn (Serbian language written in latin script) validation messages
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove some unneeded code
  fix PHP const mapping keys using the inline notation
  Fix that no-cache requires positive validation with the origin, even for fresh responses

This PR was merged into the 4.3 branch.

Discussion
----------

[Yaml] Throw on unquoted exclamation mark

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? |
| Tickets       | symfony/symfony#35344
| License       | MIT
| Doc PR        | -

Commits
-------

6b4147c991 [Yaml] Throw on unquoted exclamation mark

* 4.3:
  [Yaml] Throw on unquoted exclamation mark
  Use supportsClass where possible