Fix user topic streaming.

lib/pleroma/web/streamer.ex

@@ -150,7 +150,7 @@ defmodule Pleroma.Web.Streamer do
     end)
   end
 
-  defp internal_topic(topic, socket) when topic in ~w[user, direct] do
+  defp internal_topic(topic, socket) when topic in ~w[user direct] do
     "#{topic}:#{socket.assigns[:user].id}"
   end