     assert IO.ANSI.color_background(0) == "\e[48;5;0m"
     assert IO.ANSI.color_background(42) == "\e[48;5;42m"
     assert IO.ANSI.color_background(255) == "\e[48;5;255m"
-    assert_raise FunctionClauseError, fn() ->
+
+    assert_raise FunctionClauseError, fn ->
       IO.ANSI.color_background(-1)
     end
-    assert_raise FunctionClauseError, fn() ->
+
+    assert_raise FunctionClauseError, fn ->
       IO.ANSI.color_background(256)
     end
   end

Code.require_file "../test_helper.exs", __DIR__

defmodule IO.ANSITest do
  use ExUnit.Case, async: true

    assert IO.ANSI.color_background(0, 4, 2) == "\e[48;5;42m"
    assert IO.ANSI.color_background(1, 1, 1) == "\e[48;5;59m"
    assert IO.ANSI.color_background(5, 5, 5) == "\e[48;5;231m"

    assert_raise FunctionClauseError, fn ->
      IO.ANSI.color_background(0, 6, 1)
    end

    assert_raise FunctionClauseError, fn ->
      IO.ANSI.color_background(5, -1, 1)
    end
  end
