Workaround with_index does not support function in Elixir 1.9

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -439,18 +439,16 @@ def render("history.json", %{activity: %{data: %{"object" => _object}} = activit
     history_len = length(history)
 
     history =
-      Enum.with_index(
-        history,
-        fn object, index ->
+      Enum.zip(history_len..0, history)
+      |> Enum.map(fn {chrono_order, object} ->
         %{
           # The history is prepended every time there is a new edit.
           # In chrono_order, the oldest item is always at 0, and so on.
           # The chrono_order is an invariant kept between edits.
-            chrono_order: history_len - 1 - index,
+          chrono_order: chrono_order,
           object: object
         }
-        end
-      )
+      end)
 
     individual_opts =
       opts