run-tests.php diff dump is broken

[mvorisek]

Description

repro file: https://github.com/php/php-src/blob/7c70cd00691a141750ab61aacc9bf3e7def3134e/ext/zend_test/tests/strings_marked_as_utf8.phpt

notice explode: is missing in the output, it seems the last line before the colored diff seems to be wrongly omit, making the diff very difficult to understand

PHP Version

any

Operating System

any