ErrorHandler.php
protected static function highlightString(string $string) : string
    {
        $search  = array("\r\n", "\n\r", "\r", "\n", '<code>', '</code>', '<span style="color: #0000BB">&lt;?php&nbsp;', '#$@r4!/*');
        $replace = array('', '', '', '', '', '', '<span style="color: #0000BB">', '/*');

        return str_replace($search, $replace, highlight_string('<?php ' . str_replace('/*', '#$@r4!/*', $string), true));
    }
protected static function highlightString(string $string) : string
    {
        $search  = array("\r\n", "\n\r", "\r", "\n", '<code>', '</code>', '<span style="color: #0000BB">&lt;?php&nbsp;', '#$@r4!/*');
        $replace = array('', '', '', '', '', '', '<span style="color: #0000BB">', '/*');

        return str_replace($search, $replace, highlight_string('<?php ' . str_replace('/*', '#$@r4!/*', $string), true));
    }
Highlight string

@param  string $string String
@return string