diff --git a/lib/koans/10_map_sets.ex b/lib/koans/10_map_sets.ex
index 133b5d8..9b5cd24 100644
--- a/lib/koans/10_map_sets.ex
+++ b/lib/koans/10_map_sets.ex
@@ -25,7 +25,7 @@ defmodule MapSets do
   koan "Does this value exist in the map set?" do
     assert MapSet.member?(@set, 3) == ___
   end
-  
+
   koan "I am merely another collection but, you can perform some operations on me" do
     new_set = MapSet.new(@set, fn x -> 3 * x end)
 
diff --git a/test/koans/map_sets_koans_test.exs b/test/koans/map_sets_koans_test.exs
index d98c8d5..a9bc885 100644
--- a/test/koans/map_sets_koans_test.exs
+++ b/test/koans/map_sets_koans_test.exs
@@ -4,13 +4,13 @@ defmodule MapSetsTest do
 
   test "MapSets" do
     answers = [
-      1,      
+      1,
       3,
       :ok,
       true,
       {:multiple, [true, false]},
       true,
-      false, 
+      false,
       5,
       false,
       true,