old_contents: import time
  
  
  class Plugin:
      def __init__(self, vk_bot):
          self.vk_bot = vk_bot
          self.vk_bot.add_command('uptime', self.uptime)
  
      async def uptime(self, vk_api, sender, message):
          await self.vk_bot.send_message(sender, 'Total uptime: {} seconds'.format(round(time.time() - self.vk_bot.start_time)))
  
new_contents: import time
  
  
  class Plugin:
      def __init__(self, vk_bot):
          self.vk_bot = vk_bot
          self.vk_bot.add_command('uptime', self.uptime)
  
      async def uptime(self, vk_api, sender, message):
          await self.vk_bot.send_message(sender,
                                         'Total uptime: {} seconds'.format(round(time.time() - self.vk_bot.start_time)))
  
subject: Fix code string length (PEP8)