add .formatter.exs + format

test/koans/functions_koans_test.exs

@@ -7,7 +7,7 @@ defmodule FunctionsTests do
       "Hello, World!",
       3,
       {:multiple, ["One and Two", "Only One"]},
-      {:multiple, ["Hello Hello Hello Hello Hello ","Hello Hello "]},
+      {:multiple, ["Hello Hello Hello Hello Hello ", "Hello Hello "]},
       {:multiple, [:entire_list, :single_thing]},
       {:multiple, ["10 is bigger than 5", "4 is not bigger than 27"]},
       {:multiple, ["The number was zero", "The number was 5"]},
@@ -18,7 +18,7 @@ defmodule FunctionsTests do
       100,
       1000,
       "Full Name",
-      {:multiple, ["GOOD", "good"]},
+      {:multiple, ["GOOD", "good"]}
     ]
 
     test_all(Functions, answers)