Failing integration test when short_open_tag=on

[gharlan]

When running phpunit locally, I get this failure:

1) Symfony\CS\Tests\IntegrationTest::testIntegration with data set #1 ('misc/php_closing_tag,short_tag.test', 'Integration of fixers: php_cl...t_tag.', array(Symfony\CS\Fixer\PSR1\ShortTagFixer Object (), Symfony\CS\Fixer\PSR2\PhpClosingTagFixer Object ()), array(false, '7.0.0'), '<?\n$a = 1;\n\n?>', '<?php\n$a = 1;')
Set priorities must be significant. If fixers used in reverse order return same output then the integration test is not sufficient or the priority relation between used fixers should not be set.
Failed asserting that two strings are not identical.

Reason: short_open_tag is enabled, so the priority of ShortTagFixer is irrelevant.