From 9b492eae29851072acf45b94a897fb08b65fe5b2 Mon Sep 17 00:00:00 2001
From: Yuji Yaginuma <yuuji.yaginuma@gmail.com>
Date: Mon, 6 Oct 2025 07:49:52 +0900
Subject: [PATCH] Add `irb` to the Gemfile to fix the warning

Currently, using `bin/console` shows the following warning.

```
./bin/console:13: warning: irb was loaded from the standard library, but will no longer be part of the default gems starting from Ruby 3.5.0.
You can add irb to your Gemfile or gemspec to silence this warning.
```

This PR adds `irb` to fix it.
---
 Gemfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Gemfile b/Gemfile
index 6669eae..b165f31 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
+  gem "irb"
   gem "bundler"
   gem "rake"
   gem "test-unit"