Establish that modules are atoms, then show function call on them

lib/koans/03_atoms.ex

@@ -20,12 +20,10 @@ defmodule Atoms do
 
   koan "Modules are also atoms" do
     assert is_atom(String) == ___
-    assert :"Elixir.String" == ___
-    assert :"Elixir.String".upcase("hello") == ___
   end
 
-  koan "Atoms are used to access Erlang" do
+  koan "Functions can be called on the atom too" do
-    assert :erlang.is_list([]) == ___
+    assert :"Elixir.String" == String
-    assert :lists.sort([2, 3, 1]) == ___
+    assert :"Elixir.String".upcase("hello") == ___
   end
 end

test/koans/atoms_koans_test.exs

@@ -7,8 +7,8 @@ defmodule AtomsTests do
       :human,
       {:multiple, [:atomized, "stringified"]},
       {:multiple, [true, true, true, false]},
-      {:multiple, [true, String, "HELLO"]},
+      true,
-      {:multiple, [true, [1,2,3]]},
+      "HELLO",
     ]
 
     test_all(Atoms, answers)