Fix new credo warnings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/service/export/participants/csv.ex

@@ -41,7 +41,7 @@ defmodule Mobilizon.Service.Export.Participants.CSV do
                |> Repo.stream()
                |> Stream.map(&to_list/1)
                |> NimbleCSV.RFC4180.dump_to_iodata()
-               |> (fn stream -> Stream.concat([Enum.join(columns(), ","), "\n"], stream) end).()
+               |> add_header_column()
                |> Stream.each(fn line -> IO.write(file, line) end)
                |> Stream.run()
 
@@ -63,6 +63,10 @@ defmodule Mobilizon.Service.Export.Participants.CSV do
     end
   end
 
+  defp add_header_column(stream) do
+    Stream.concat([Enum.join(columns(), ","), "\n"], stream)
+  end
+
   @spec save_csv_upload(String.t(), String.t(), Event.t()) ::
           {:ok, Export.t()} | {:error, atom() | Ecto.Changeset.t()}
   defp save_csv_upload(full_path, filename, %Event{id: event_id, title: title}) do

lib/service/export/participants/ods.ex

@@ -39,7 +39,7 @@ defmodule Mobilizon.Service.Export.Participants.ODS do
                  |> Events.participant_for_event_export_query(Keyword.get(options, :roles, []))
                  |> Repo.all()
                  |> Enum.map(&to_list/1)
-                 |> (fn data -> Enum.concat([columns()], data) end).()
+                 |> add_header_columns()
                  |> generate_ods()
 
                File.write!(full_path, content)
@@ -62,6 +62,10 @@ defmodule Mobilizon.Service.Export.Participants.ODS do
     end
   end
 
+  defp add_header_columns(data) do
+    Enum.concat([columns()], data)
+  end
+
   defp generate_ods(data) do
     data
     |> Jason.encode!()