Polish and more checks during configuration

cogs/audio.py

@@ -245,7 +245,7 @@ class Audio:
         self.current = -1
         self.music_player.stop()
         await asyncio.sleep(1)
-        await self.bot.voice.disconnect()
+        if self.bot.voice: await self.bot.voice.disconnect()
 
     @commands.command(name="queue", pass_context=True, no_pm=True) #check that author is in the same channel as the bot
     async def _queue(self, ctx, link : str=None):

cogs/trivia.py

@@ -19,7 +19,8 @@ class Trivia:
     async def trivia(self, ctx, list_name : str=None):
         """Start a trivia session with the specified list
 
-        Stop parameter will end the current session
+        trivia stop - Ends the current session
+        trivia - Shows trivia lists
         """
         message = ctx.message
         if list_name == None: