explain redirection urls for expert

config/routes.rb

@@ -301,8 +301,12 @@ Rails.application.routes.draw do
 
   scope module: 'instructeurs', as: 'instructeur' do
     get 'avis', to: 'avis#all', as: 'all_avis'
+
+    # this redirections are ephemeral, to ensure that emails sent to experts before are still valid
+    # TODO : they will be removed in September, 2020
     get 'avis/:id', to: redirect('/procedures/old/avis/%{id}')
     get 'avis/:id/sign_up/email/:email', to: redirect("/procedures/old/avis/%{id}/sign_up/email/%{email}"), constraints: { email: /.*/ }
+
     resources :procedures, only: [:index, :show], param: :procedure_id do
       member do
         resources :groupes, only: [:index, :show], controller: 'groupe_instructeurs' do