Fix error on parameter-less QUIT

irclog.py

@@ -586,7 +586,8 @@ class IRCClientProtocol(asyncio.Protocol):
 				return
 			for channel in channels:
 				if line.command == 'QUIT':
-					message = f'{get_mode_nick(channel)} quits [{line.params[0]}]'
+					reason = f' [{line.params[0]}]' if len(line.params) == 1 else ''
+					message = f'{get_mode_nick(channel)} quits{reason}'
 				elif line.command == 'NICK':
 					newMode = self.get_mode_char(self.server.channels[self.server.casefold(channel)].users[self.server.casefold(line.hostmask.nickname)])
 					message = f'{get_mode_nick(channel)} is now known as {newMode}{line.params[0]}'