old_contents: from legder import LedgerPlugin
  from electrum.util import print_msg
  
  class BTChipCmdLineHandler:
      def stop(self):
          pass
  
      def show_message(self, msg):
          print_msg(msg)
  
      def prompt_auth(self, msg):
          import getpass
          print_msg(msg)
          response = getpass.getpass('')
          if len(response) == 0:
              return None
          return response
  
  class Plugin(LedgerPlugin):
      handler = BTChipCmdLineHandler()
  
new_contents: from ledger import LedgerPlugin
  from electrum.util import print_msg
  
  class BTChipCmdLineHandler:
      def stop(self):
          pass
  
      def show_message(self, msg):
          print_msg(msg)
  
      def prompt_auth(self, msg):
          import getpass
          print_msg(msg)
          response = getpass.getpass('')
          if len(response) == 0:
              return None
          return response
  
  class Plugin(LedgerPlugin):
      handler = BTChipCmdLineHandler()
  
subject: fix spelling module name