Actually fix the order in Guild.by_category.

discord/guild.py

@@ -340,13 +340,13 @@ class Guild(Hashable):
 
         def key(t):
             k, v = t
-            return ((not isinstance(k, TextChannel), k.position, k.id) if k else (-1, -1, -1), v)
+            return ((k.position, k.id) if k else (-1, -1), v)
 
         _get = self._channels.get
         as_list = [(_get(k), v) for k, v in grouped.items()]
         as_list.sort(key=key)
         for _, channels in as_list:
-            channels.sort(key=lambda c: (c.position, c.id))
+            channels.sort(key=lambda c: (not isinstance(c, TextChannel), c.position, c.id))
         return as_list
 
     def get_channel(self, channel_id):