Add RDoc dependency

kou · kou · commit 49129ff63b62 · 2025-02-24T12:05:02.000+09:00
Because RDoc is changed to bundled gem.
diff --git a/Gemfile b/Gemfile
@@ -6,6 +6,7 @@ gemspec
 group :development do
   gem "bundler"
   gem "rake"
+  gem "rdoc"
   gem "benchmark_driver"
   gem "test-unit", ">= 3.4.8"
 end
