League\HTMLToMarkdown\Converter\ParagraphConverter::escapeFirstCharacters PHP Метод

    private function escapeFirstCharacters($line)
    {
        $escapable = array('>', '- ', '+ ', '--', '~~~', '---', '- - -');
        foreach ($escapable as $i) {
            if (strpos(ltrim($line), $i) === 0) {
                // Found a character that must be escaped, adding a backslash before
                return '\\' . ltrim($line);
            }
        }
        return $line;
    }