Files that do not contain a newline are not handled correctly

[thirsch]

Q	A
php-code-coverage version	9.2.3
PHP version	7.4.12
Driver	Xdebug
Xdebug version (if used)	2.9.8
Installation Method	Composer
Usage Method	PHPUnit
PHPUnit version (if used)	9.4.3

If there is an completely empty file with only one line without a trailing linebreak in your coverage folder, the coverage can't be created, because the value for $linesOfCode after counting \n is 0, whereas the calculated amount of comments is 1 and results in an exception of type SebastianBergmann\LinesOfCode\NegativeValueException.

Fatal error: Uncaught SebastianBergmann\LinesOfCode\NegativeValueException: $nonCommentLinesOfCode must not be negative in /.../vendor/phpunit/phpunit/src/TextUI/Command.php on line 103

PHPUnit\TextUI\Exception: $nonCommentLinesOfCode must not be negative in /.../vendor/phpunit/phpunit/src/TextUI/Command.php on line 103

Call Stack:
    0.0006     411104   1. {main}() /.../vendor/phpunit/phpunit/phpunit:0
    0.0162    1110472   2. PHPUnit\TextUI\Command::main() /var/ftproot/www/symfony-tests/vendor/phpunit/phpunit/phpunit:61

We've had no issues with PHPUnit 8.* and below with empty files.