Avoid unecessary wrap inside do keyword

lib/elixir/src/elixir_errors.erl

@@ -96,7 +96,7 @@ handle_file_warning(_, File, {Line, sys_core_fold, {no_effect, {erlang, F, A}}})
     false ->
       case erl_internal:bif(F, A) of
         false -> {"the call to :erlang.~ts/~B has no effect", [F,A]};
-        true -> {"the call to ~ts/~B has no effect", [F,A]}
+        true ->  {"the call to ~ts/~B has no effect", [F,A]}
       end
   end,
   Message = io_lib:format(Fmt, Args),

lib/ex_unit/lib/ex_unit/case.ex

@@ -198,9 +198,9 @@ defmodule ExUnit.Case do
   defmacro test(message, var \\ quote(do: _), contents) do
     contents =
       case contents do
-        [do: _] ->
+        [do: block] ->
           quote do
-            unquote(contents)
+            unquote(block)
             :ok
           end
         _ ->