Description

You're using the term occurence in some files :

• src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler/DeprecationNotice.php
• src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler/DeprecationGroup.php

And associated tests :

• src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/DeprecationNoticeTest.php
• src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/DeprecationGroupTest.php

Occurence is the French term. You should use Occurrence instead.