* 2.7:
fixed @return when returning this or static
override property constraints in child class
[Console] improved code coverage of Command class
Only count on arrays or countables to avoid warnings in PHP 7.2
* 2.3: (22 commits)
Fix incorrect romanian plural translations
fix axes handling in Crawler::filterXPath()
fix some docblocks
Fixed self-reference in 'service_container' service breaks garbage collection (and clone).
[Process] Fix tests when pcntl is not available.
[DependencyInjection] Roll back changes made to generated files.
[Console] Roll back changes made to fixture files.
[Validator] Added more detailed inline documentation
[Validator] Removed information from the violation output if the value is an array, object or resource
partially reverted previous commit
fixed CS
properly handle null data when denormalizing
[Validator] Renamed valueToString() to formatValue(); added missing formatValue() calls
[Validator] Fixed CS
[Validator] Fixed date-to-string conversion tests to match ICU 51
[Validator] Added "{{ value }}" parameters where they were missing
[Validator] Simplified and explained the LuhnValidator
[Validator] Simplified IssnValidator
[Validator] Fixed and simplified IsbnValidator
[Validator] Simplified IBAN validation algorithm
...
Conflicts:
src/Symfony/Component/Console/Helper/DescriptorHelper.php
src/Symfony/Component/DependencyInjection/Container.php
src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
src/Symfony/Component/HttpFoundation/File/UploadedFile.php
src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
src/Symfony/Component/Validator/Constraints/AbstractComparisonValidator.php
src/Symfony/Component/Validator/Constraints/CollectionValidator.php
src/Symfony/Component/Validator/Tests/Constraints/EqualToValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/GreaterThanValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/IdenticalToValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/LessThanOrEqualValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/NotEqualToValidatorTest.php
src/Symfony/Component/Validator/Tests/Constraints/NotIdenticalToValidatorTest.php
