parseFileDiff example

        $lineCount = count($lines);
        $diffs     = [];
        $diff      = null;
        $collected = [];

        for ($i = 0; $i < $lineCount; ++$i) {
            if (preg_match('#^---\h+"?(?P<file>[^\\v\\t"]+)#', $lines[$i], $fromMatch) &&
                preg_match('#^\\+\\+\\+\\h+"?(?P<file>[^\\v\\t"]+)#', $lines[$i + 1], $toMatch)) {
                if ($diff !== null) {
                    $this->parseFileDiff($diff, $collected);

                    $diffs[]   = $diff;
                    $collected = [];
                }

                $diff = new Diff($fromMatch['file'], $toMatch['file']);

                ++$i;
            } else {
                if (preg_match('/^(?:diff --git |index [\da-f\.]+|[+-]{3} [ab])/', $lines[$i])) {
                    continue;
                }