Bug: Parser will overwrite the value if the initial variable is same

[hurtsky]

Direction
when using parser to render view, the parser can't differentiate between {expired_discount} with {expired_discount_date}

Describe the bug
Code example
Controller:

<?php

namespace App\Controllers;

class Test extends BaseController
{
	public function index()
	{
		$data = [
			'expired_discount'           => '1212312423470',
			'expired_discount_date'  => '1999-09-09',
		];
		echo $this->parser->setData($data)->render('test');
	}
}

View:

<p>Expired Discount Serial = {expired_discount}</p>
<p>Expired Discount Date = {expired_discount_date}</p>

Result:

Expired Discount Serial = 1212312423470

Expired Discount Date = 1212312423470

expired_discount_date will have the same value as expired_discount

CodeIgniter 4 version
branch: develop

Expected behavior, and steps to reproduce if appropriate
value of expired_discount should not be the same with expired_discount_date

Context

• OS: Window 10
• Apache 2.4.46
• 7.4.10