docs: def cmd(send, msg, args):
      """When a nick was last seen.
  
      Syntax: {command} <nick>
  
      """
      if not msg:
          send("Seen who?")
          return
      cmdchar, ctrlchan = args['config']['core']['cmdchar'], args['config']['core']['ctrlchan']
      last = get_last(args['db'], cmdchar, ctrlchan, msg)
      if last is None:
          send("%s has never shown their face." % msg)
          return
      delta = datetime.now() - last.time
      # We only need second-level precision.
      delta -= delta % timedelta(seconds=1)
      output = "%s was last seen %s ago " % (msg, delta)
      if last.type == 'pubmsg' or last.type == 'privmsg':
          output += 'saying "%s"' % last.msg
      elif last.type == 'action':
          output += 'doing "%s"' % last.msg
      elif last.type == 'part':
          output += 'leaving and saying "%s"' % last.msg
      elif last.type == 'nick':
          output += 'nicking to %s' % last.msg
      elif last.type == 'quit':
          output += 'quiting and saying "%s"' % last.msg
      elif last.type == 'kick':
          output += 'kicking %s for "%s"' % last.msg.split(',')
      elif last.type == 'topic':
          output += 'changing topic to %s' % last.msg
      elif last.type in ['pubnotice', 'privnotice']:
          output += 'sending notice %s' % last.msg
      elif last.type == 'mode':
          output += 'setting mode %s' % last.msg
      else:
          raise Exception("Invalid type.")
      send(output)