diff --git a/lib/koans/20_comprehensions.ex b/lib/koans/20_comprehensions.ex
index 35eeccb..ff12018 100644
--- a/lib/koans/20_comprehensions.ex
+++ b/lib/koans/20_comprehensions.ex
@@ -1,33 +1,33 @@
-defmodule Comprehensions do
-  use Koans
-
-  @intro "A comprehension is made of three parts: generators, filters, and collectibles. We will look at how these interact with eachother"
-
-  koan "The generator, `n <- [1, 2, 3, 4]`, is providing the values for our comprehension" do
-    assert (for n <- [1, 2, 3, 4], do: n * n) == ___
-  end
-
-  koan "Any enumerable can be a generator" do
-    assert (for n <- 1..4, do: n * n) == ___
-  end
-
-  koan "A generator specifies how to extract values from a collection" do
-    collection = [["Hello","World"], ["Apple", "Pie"]]
-    assert (for [a, b] <- collection, do: "#{a} #{b}") == ___
-  end
-
-  koan "You can use multiple generators at once" do
-    assert (for x <- ["little", "big"], y <- ["dogs", "cats"], do: "#{x} #{y}") == ___
-  end
-
-  koan "Use a filter to reduce your work" do
-    assert (for n <- [1, 2, 3, 4, 5, 6], n > 3, do: n) == ___
-  end
-
-  koan "Add the result of a comprehension to an existing collection" do
-    collection = ["Apple Pie"]
-    collection = for x <- ["Pecan", "Pumpkin"], into: collection, do: "#{x} Pie"
-    assert collection == ___
-  end
-
-end
+defmodule Comprehensions do
+  use Koans
+
+  @intro "A comprehension is made of three parts: generators, filters, and collectibles. We will look at how these interact with eachother"
+
+  koan "The generator, `n <- [1, 2, 3, 4]`, is providing the values for our comprehension" do
+    assert (for n <- [1, 2, 3, 4], do: n * n) == ___
+  end
+
+  koan "Any enumerable can be a generator" do
+    assert (for n <- 1..4, do: n * n) == ___
+  end
+
+  koan "A generator specifies how to extract values from a collection" do
+    collection = [["Hello","World"], ["Apple", "Pie"]]
+    assert (for [a, b] <- collection, do: "#{a} #{b}") == ___
+  end
+
+  koan "You can use multiple generators at once" do
+    assert (for x <- ["little", "big"], y <- ["dogs", "cats"], do: "#{x} #{y}") == ___
+  end
+
+  koan "Use a filter to reduce your work" do
+    assert (for n <- [1, 2, 3, 4, 5, 6], n > 3, do: n) == ___
+  end
+
+  koan "Add the result of a comprehension to an existing collection" do
+    collection = ["Apple Pie"]
+    collection = for x <- ["Pecan", "Pumpkin"], into: collection, do: "#{x} Pie"
+    assert collection == ___
+  end
+
+end