Make sure put_attribute still returns a quoted expression

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>

Author: José Valim

lib/elixir/lib/calendar.ex

@@ -90,7 +90,7 @@ defmodule Calendar do
   @callback date_to_string(year, month, day) :: String.t
 
   @doc """
-  Coverts the date time (without time zone) into a string according to the calendar.
+  Converts the date time (without time zone) into a string according to the calendar.
   """
   @callback naive_datetime_to_string(year, month, day, hour, minute, second, microsecond) :: String.t
 

lib/elixir/lib/module.ex

@@ -843,16 +843,14 @@ defmodule Module do
   @doc """
   Puts a module attribute with key and value in the given module.
 
-  It returns the value of the attribute after normalization.
-
   ## Examples
 
       defmodule MyModule do
         Module.put_attribute __MODULE__, :custom_threshold_for_lib, 10
       end
 
   """
-  @spec put_attribute(module, key :: atom, value :: term) :: term
+  @spec put_attribute(module, key :: atom, value :: term) :: :ok
   def put_attribute(module, key, value) do
     put_attribute(module, key, value, nil, nil)
   end
@@ -920,9 +918,10 @@ defmodule Module do
   end
 
   @doc """
-  Registers an attribute. By registering an attribute, a developer
-  is able to customize how Elixir will store and accumulate the
-  attribute values.
+  Registers an attribute.
+
+  By registering an attribute, a developer is able to customize
+  how Elixir will store and accumulate the attribute values.
 
   ## Options
 
@@ -1076,7 +1075,7 @@ defmodule Module do
         :ets.insert(table, {key, value, false, unread_line})
     end
 
-    value
+    :ok
   end
 
   ## Helpers

lib/elixir/test/elixir/module_test.exs

@@ -60,7 +60,7 @@ defmodule ModuleTest do
 
   test "module attributes returns value" do
     in_module do
-      assert (@return [:foo, :bar]) == [:foo, :bar]
+      assert (@return [:foo, :bar]) == :ok
       _ = @return
     end
   end