Deprecated 'assertFileEquals/assertStringEqualsFile' usage

Reports the deprecated usages of the assertFileEquals, assertFileNotEquals, assertStringEqualsFile, and assertStringNotEqualsFile functions with the $canonicalize and $ignoreCase parameters.

The optional $canonicalize and $ignoreCase parameters of the assertFileEquals and assertFileNotEquals functions are deprecated and will be removed in PHPUnit 9.

See Usage of the assertFileEquals function (phpunit.readthedocs.io) or Usage of the assertFileEquals function (phpunit.readthedocs.io) for details.