get_progress: align case and when as rubocop

app/models/target.rb

@@ -28,16 +28,17 @@ class Target < ActiveRecord::Base
   # ====Returns
   # * +String+ -> progress in percent
   def get_progress
-    numerator = case unit
+    numerator =
-    when Target.units[:submissions]
+      case unit
-      conference.events.where('created_at < ?', due_date).count
+      when Target.units[:submissions]
-    when Target.units[:registrations]
+        conference.events.where('created_at < ?', due_date).count
-      conference.registrations.where('created_at < ?', due_date).count
+      when Target.units[:registrations]
-    when Target.units[:program_minutes]
+        conference.registrations.where('created_at < ?', due_date).count
-      conference.current_program_minutes
+      when Target.units[:program_minutes]
-    else
+        conference.current_program_minutes
-      0
+      else
-    end
+        0
+      end
 
     (100 * numerator / target_count).to_s
   end