From 78f8833eb221a7e42d13ad3dbd77f8c0fcae604f Mon Sep 17 00:00:00 2001
From: Jan Renz <jan.renz@gmail.com>
Date: Thu, 23 Apr 2015 15:45:19 +0200
Subject: [PATCH] handle 0 max score

---
 app/models/submission.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/models/submission.rb b/app/models/submission.rb
index 8ee7c541..b8667e68 100644
--- a/app/models/submission.rb
+++ b/app/models/submission.rb
@@ -42,7 +42,7 @@ class Submission < ActiveRecord::Base
       score / exercise.maximum_score
     else
       0
-    return
+    end
   end
 
   def percentage