diff --git a/lib/koans/04_numbers.ex b/lib/koans/04_numbers.ex
index 89d4bb9..2827692 100644
--- a/lib/koans/04_numbers.ex
+++ b/lib/koans/04_numbers.ex
@@ -12,24 +12,24 @@ defmodule Numbers do
     assert Integer.is_even(4) == ___
   end
 
-  koan "Let's grab the individual digits in a list" do 
+  koan "Let's grab the individual digits in a list" do
     individual_digits = Integer.digits(58127)
     assert individual_digits == ___
   end
 
-  koan "Oh no! I need it back together" do 
+  koan "Oh no! I need it back together" do
     number = Integer.undigits([1, 2, 3, 4])
 
     assert number == ___
   end
 
-  koan "I think I need my number as a char" do 
+  koan "I think I need my number as a char" do
     char_digit = Integer.to_char_list(7)
 
     assert char_digit == ___
   end
 
-  koan "Actually I want my number as a string" do 
+  koan "Actually I want my number as a string" do
     string_digit = Integer.to_string(1234)
 
     assert string_digit == ___
@@ -85,8 +85,8 @@ defmodule Numbers do
     assert 0 in range == ___
   end
 
-  koan "Is this a range?" do    
+  koan "Is this a range?" do
     assert Range.range?(1..10) == ___
     assert Range.range?(0) == ___
   end
-end
\ No newline at end of file
+end
diff --git a/lib/koans/10_map_sets.ex b/lib/koans/10_map_sets.ex
index 353e8b7..71dd50d 100644
--- a/lib/koans/10_map_sets.ex
+++ b/lib/koans/10_map_sets.ex
@@ -7,7 +7,7 @@ defmodule MapSets do
 
   koan "I am very similar to a list" do
     assert Enum.fetch(@set, 0) == {:ok, ___}
-  end 
+  end
 
   koan "However, I do not allow duplication" do
     new_set = MapSet.new([1, 1, 2, 3, 3, 3])
@@ -67,4 +67,4 @@ defmodule MapSets do
   koan "I want my set in a list" do
     assert MapSet.to_list(@set) == ___
   end
-end
\ No newline at end of file
+end