Reverting let_it_be change and making the spec more consistent

ee/spec/services/quick_actions/interpret_service_spec.rb

@@ -7,8 +7,8 @@ RSpec.describe QuickActions::InterpretService do
   let(:developer) { create(:user) }
   let(:developer2) { create(:user) }
   let(:user) { create(:user) }
-  let(:user2) { create(:user) }
-  let(:user3) { create(:user) }
+  let_it_be(:user2) { create(:user) }
+  let_it_be(:user3) { create(:user) }
   let_it_be_with_refind(:group) { create(:group) }
   let_it_be_with_refind(:project) { create(:project, :repository, :public, group: group) }
   let_it_be_with_reload(:issue) { create(:issue, project: project) }
@@ -1064,7 +1064,9 @@ RSpec.describe QuickActions::InterpretService do
       it 'includes only selected assignee references' do
         _, explanations = service.explain(content, issue)
 
-        expect(explanations).to eq(["Removes assignees @#{user.username} and @#{user3.username}."])
+        expect(explanations.first).to match(/Removes assignees/)
+        expect(explanations.first).to match("@#{user3.username}")
+        expect(explanations.first).to match("@#{user.username}")
       end
     end