Update custom_msg/custom_msg.py

Co-authored-by: tigattack <10629864+tigattack@users.noreply.github.com>

Author: MrMrRubic

custom_msg/custom_msg.py

@@ -39,8 +39,10 @@ async def msg_create(self, ctx: commands.GuildContext, specified_channel: Option
 
     @msg_cmd.command(name="edit")  # type: ignore
     async def msg_edit(self, ctx: commands.Context, message: discord.Message):
-        """Use message link when specifying what message to edit.
-        Message ID will likely not work."""
+        """Edit a message sent by this cog
+        It's best to use a message link when specifying which message to edit.
+        Providing a message ID is likely to fail for older messages, as they won't be in cache.
+        """
 
         if message.author != ctx.me:
             return await ctx.send("You must specify a message that was sent by the bot.")