Little refactor for milestone_remaining_days helper from last code review.

app/helpers/milestones_helper.rb

@@ -38,11 +38,10 @@ module MilestonesHelper
   end
 
   def milestone_remaining_days(milestone)
-    days = milestone.remaining_days
-
-    if days == 0
+    if milestone.expired?
       content_tag(:strong, 'expired')
-    elsif days.to_i > 0
+    elsif milestone.due_date
+      days    = milestone.remaining_days
       content = content_tag(:strong, days)
       content << " #{'day'.pluralize(days)} remaining"
     end

app/models/milestone.rb

@@ -111,8 +111,7 @@ class Milestone < ActiveRecord::Base
   end
 
   def remaining_days
-    return nil if due_date.nil?
-    return 0   if due_date < Date.today
+    return 0 if !due_date || expired?
 
     (due_date - Date.today).to_i
   end