Merge pull request #206 from rabbitmq/rabbitmq-cli-205

Supress banner for machine readable formats

deps/rabbitmq_cli/lib/rabbitmqctl.ex

@@ -209,10 +209,17 @@ defmodule RabbitMQCtl do
     end
   end
 
-  ## Suppress banner if --quiet option is provided
+  # Suppress banner if --quiet option is provided
   defp maybe_print_banner(_, _, %{quiet: true}) do
     nil
   end
+  # Suppress banner if a machine-readable formatter is used
+  defp maybe_print_banner(_, _, %{formatter: "csv"}) do
+    nil
+  end
+  defp maybe_print_banner(_, _, %{formatter: "json"}) do
+    nil
+  end
   defp maybe_print_banner(command, args, opts) do
     case command.banner(args, opts) do
       nil -> nil