Fix plural translation

ee/app/views/subscriptions/groups/edit.html.haml

@@ -7,7 +7,7 @@
         = image_tag('illustrations/subscription-success.svg', class: 'mw-xs')
       .gl-banner-content.d-flex.flex-column.justify-content-center
         %h3= _('Thanks for your purchase!')
-        - number_of_users = n_('1 user', '%{num} users', params[:quantity]) % { num: params[:quantity] }
+        - number_of_users = n_('1 user', '%{num} users', params[:quantity].to_i) % { num: params[:quantity] }
         %p= _('You have successfully purchased a %{plan} plan subscription for %{seats}. You’ll receive a receipt via email.') % { plan: plan_title, seats: number_of_users }
     .edit-group.d-flex.flex-column.align-items-center.gl-pt-5
       #progress-bar

ee/spec/views/subscriptions/groups/edit.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'subscriptions/groups/edit' do
+  before do
+    assign(:group, Group.new)
+
+    allow(view).to receive(:params).and_return(quantity: quantity)
+    allow(view).to receive(:plan_title).and_return('Bronze')
+    allow(view).to receive(:group_path).and_return('')
+    allow(view).to receive(:subscriptions_groups_path).and_return('')
+    allow(view).to receive(:current_user).and_return(User.new)
+  end
+
+  context 'a single user' do
+    let(:quantity) { '1' }
+
+    it 'displays the correct notification for 1 user' do
+      render
+
+      expect(rendered).to have_text('You have successfully purchased a Bronze plan subscription for 1 user. You’ll receive a receipt via email.')
+    end
+  end
+
+  context 'multiple users' do
+    let(:quantity) { '2' }
+
+    it 'displays the correct notification for 2 users' do
+      render
+
+      expect(rendered).to have_text('You have successfully purchased a Bronze plan subscription for 2 users. You’ll receive a receipt via email.')
+    end
+  end
+end