new_contents: from .base_executor import ScriptExecutor
  from judgeenv import env
  
  
  class Executor(ScriptExecutor):
      ext = '.txt'
      name = 'TEXT'
      command = env['runtime'].get('cat', '/bin/cat')
      test_program = 'echo: Hello, World!\n'
      fs = ['.*\.(?:so|txt)']
      syscalls = ['fadvise64_64']
  
  initialize = Executor.initialize
  
subject: Add TEXT executor; #87