fix(nerdify): actually fixed the error message

nerdify/nerdify.py

@@ -34,7 +34,7 @@ class Nerdify(commands.Cog):
                 messages = [message async for message in ctx.channel.history(limit=2)]
                 # [0] is the command, [1] is the message before the command
                 text = messages[1].content
-                if text is None:
+        if text == "":
             await ctx.send(chat_formatting.error("I can't translate that!"))
             return
         await self.type_message(