Fix trailing slash in XdebugFilterScriptGenerator - closes #3834

[shivammathur]

This should properly add the trailing slash to files in xdebug-filter.php as reported in #3834

[sebastianbergmann]

Thank you for your contribution. I appreciate the time you invested in preparing this pull request. However, I have already fixed the issue in 002c0e2.

My patch does not add addslashes(), though. Are you sure that this is required?

[shivammathur]

Thank you for your contribution. I appreciate the time you invested in preparing this pull request. However, I have already fixed the issue in 002c0e2.

My patch does not add addslashes(), though. Are you sure that this is required?

Without addslashes it will lead to endquote being escaped by DIRECTORY_SEPARATOR and it will give a syntax error while running the tests.

<?php declare(strict_types=1);
if (!\function_exists('xdebug_set_filter')) {
    return;
}

\xdebug_set_filter(
    \XDEBUG_FILTER_CODE_COVERAGE,
    \XDEBUG_PATH_WHITELIST,
    [
        'C:\path\dir\'
    ]
);

Error: (T_ENCAPSED_AND_WHITESPACE), expecting ']' in xdebug-filter.php

it should be 'C:\path\dir\\'