[donatj]

The project maintains a separate copy of its PHP-CS-Fixer rules. The continuous integration checks do not run the fixer.

Use the shared PHP 7.4 preset. Keep the existing source scope and the project's return-type spacing. Preserve the PHPUnit migration and visibility rules. Apply the resulting source changes. Run the fixer in dry-run mode as part of make test.

Bump PHP-CS-Fixer and allow it to run on PHP 8.6 through its configuration. Enable Composer package sorting and sort the dependency lists.

Validation: composer validate --no-check-publish and make test on PHP 8.5. The fixer dry run is clean. All eight tests pass.

[Copilot]

🟢 Approval recommended

No active review issues are reported for the shared PHP-CS-Fixer preset and formatting-check changes.

No open issues 🎉

What changed in this PR

Replaces the project’s duplicated PHP-CS-Fixer rules with the shared PHP 7.4 preset and adds formatting checks to make test.

Changes:

• Adopts the shared preset while retaining project-specific return-type spacing, PHPUnit migration, visibility rules, and source scope.
• Updates PHP-CS-Fixer, permits unsupported PHP versions through configuration, and enables Composer package sorting.
• Applies the resulting formatting changes and adds a fixer dry run to the existing style checks.

File	Description
src/​Corpus/​Sniffs/​TestCase.php	Simplifies equivalent backslash escaping in the fixture assertion.
src/​Corpus/​Sniffs/​Methods/​MethodParameterFormattingSniff.php	Adds trailing commas to multiline calls.
src/​Corpus/​Sniffs/​General/​ReturnTrailingNewlineSniff.php	Adds a trailing comma to a multiline call.
src/​Corpus/​Sniffs/​General/​BinaryOperationNewlineSniff.php	Adds a trailing comma to a multiline call.
src/​Corpus/​Sniffs/​ControlStructures/​OpeningOneTrueBraceSniff.php	Adds a trailing comma to a multiline call.
src/​Corpus/​Sniffs/​ControlStructures/​ClosingBraceNewlineSniff.php	Adds a trailing comma to a multiline call.
Makefile	Runs PHP-CS-Fixer in dry-run mode during style checks.
composer.json	Adds the shared configuration dependency, updates the fixer, and sorts dependencies.
.php-cs-fixer.dist.php	Replaces local rules with the shared preset and project-specific overrides.

_{Review effort: Balanced}