fixes debug output

beitragsquittung.rb

@@ -123,7 +123,7 @@ else
   puts "Payments:"
   total_payment = 0
   payments.each do |payment|
-    puts payment[:date] + " " + payment[:amount].to_s
+    puts payment[:date].to_s + " " + payment[:amount].to_s
     total_payment += payment[:amount]
   end