[Bug]: Whitespace trim on `{%- endcomment -%}` tag does not remove trailing whitespace

[ryo-morimoto]

What happened?

When using whitespace trim (-%}) on the {% endcomment %} tag, trailing whitespace and newlines are not removed as expected.

Expected behavior: {%- endcomment -%} should remove all trailing whitespace (spaces and newlines) from the output, matching the behavior of Shopify's official Liquid implementation and its tests.

Actual behavior: Trailing whitespace and newlines are preserved even when whitespace trim is specified.

How to reproduce the bug

<?php

require_once __DIR__ . '/vendor/autoload.php';

use Keepsuit\Liquid\Environment;

$environment = Environment::default();

// Test 1: Trailing spaces are not trimmed
$template = "{%- comment -%}123{%- endcomment -%}     Hello!";
$result = $environment->parseString($template)->render($environment->newRenderContext());
echo json_encode($result) . "\n";
// Expected: "Hello!"
// Actual:   "     Hello!"

// Test 2: Trailing newline is not trimmed
$template = "{%- comment -%}123{%- endcomment -%}\nHello!";
$result = $environment->parseString($template)->render($environment->newRenderContext());
echo json_encode($result) . "\n";
// Expected: "Hello!"
// Actual:   "\nHello!"

For comparison, other tags like {% if %} work correctly:

// This works correctly
$template = "{%- if true -%}yes{%- endif -%}\nHello!";
$result = $environment->parseString($template)->render($environment->newRenderContext());
// Result: "yesHello!" (newline is trimmed)

Package Version

0.9.0

PHP Version

8.3.28

Which operating systems does with happen with?

Linux