fix credo

apps/explorer/lib/explorer/chain/address_transaction_csv_exporter.ex

@@ -1,7 +1,11 @@
 defmodule Explorer.Chain.AddressTransactionCsvExporter do
-  alias Explorer.Chain
+  @moduledoc """
+  Exports transactions to a csv file.
+  """
+
+  alias Explorer.{Chain, PagingOptions}
   alias Explorer.Chain.{Address, Transaction}
-  alias Explorer.PagingOptions
+  alias NimbleCSV.RFC4180
 
   @necessity_by_association [
     necessity_by_association: %{
@@ -20,6 +24,7 @@ defmodule Explorer.Chain.AddressTransactionCsvExporter do
 
   @paging_options %PagingOptions{page_size: @page_size + 1}
 
+  @spec export(Address.t()) :: String.t()
   def export(address) do
     address
     |> fetch_all_transactions(@paging_options)
@@ -47,8 +52,9 @@ defmodule Explorer.Chain.AddressTransactionCsvExporter do
   defp dump_data_to_csv(transactions) do
     {:ok, path} = Briefly.create()
 
+    _ =
       transactions
-    |> NimbleCSV.RFC4180.dump_to_stream()
+      |> RFC4180.dump_to_stream()
       |> Stream.into(File.stream!(path))
       |> Enum.to_list()