old_contents: import os
  from .clr_executor import CLRExecutor
  from executors.utils import test_executor
  from judgeenv import env
  
  
  class Executor(CLRExecutor):
      extension = 'fs'
      compiler = 'fsc'
      compile_args = ['--nologo', '--out:{exe}', '{source}']
  
  
  def initialize():
      if 'fsc' not in env['runtime']:
          return False
      if not os.path.isfile(env['runtime']['fsc']):
          return False
      return test_executor('FS', Executor, 'printfn "Hello, World!"')
new_contents: import os
  from .clr_executor import CLRExecutor
  from executors.utils import test_executor
  from judgeenv import env
  
  
  class Executor(CLRExecutor):
      extension = 'fs'
      compiler = 'fsc'
      compile_args = ['--nologo', '--out:{exe}', '{source}']
  
  
  def initialize(sandbox=True):
      # TODO: sandbox is ignored
      if 'fsc' not in env['runtime']:
          return False
      if not os.path.isfile(env['runtime']['fsc']):
          return False
      return test_executor('FS', Executor, 'printfn "Hello, World!"')
  
subject: Update FS.py