tests: simplify object fetching and containment tests

test/object/containment_test.exs

@@ -65,7 +65,7 @@ defmodule Pleroma.Object.ContainmentTest do
       assert capture_log(fn ->
                {:error, _} = User.get_or_fetch_by_ap_id("https://n1u.moe/users/rye")
              end) =~
-               "[error] Could not decode user at fetch https://n1u.moe/users/rye, {:error, :error}"
+               "[error] Could not decode user at fetch https://n1u.moe/users/rye"
     end
   end