Translation helper strips ! from action name for lazy translations

spec/telegram/bot/updates_controller/translation_spec.rb

@@ -0,0 +1,17 @@
+RSpec.describe Telegram::Bot::UpdatesController::Translation do
+  describe '#translate' do
+    let(:controller) do
+      double(
+        controller_path: 'telegram/webhooks',
+        action_name: 'start!',
+      ).tap { |x| x.extend(described_class) }
+    end
+
+    it 'uses action_name without ! for lazy translations' do
+      expect(I18n).to receive(:translate).with('telegram.webhooks.start.hello',
+        default: [:'telegram.webhooks.hello'],
+      )
+      controller.t('.hello')
+    end
+  end
+end