old_contents: import os
  import subprocess
  
  from ..platform_name import platform_name
  
  if platform_name() == 'windows':
      from .windows import *
  else:
      from .posix import *
  
  
  class shell_list(list):
      """A special subclass of list used to mark that this command line uses
      special shell characters."""
      pass
  
  
  def execute(args, shell=False, env=None, quiet=False):
      stderr = None
      if quiet:
          stderr = open(os.devnull, 'wb')
      try:
          result = subprocess.check_output(
              args, universal_newlines=True, shell=shell, env=env, stderr=stderr
          )
      finally:
          if quiet:
              stderr.close()
      return result
  
new_contents: import os
  import subprocess
  
  from ..platform_name import platform_name
  
  if platform_name() == 'windows':
      from .windows import *
  else:
      from .posix import *
  
  
  class shell_list(list):
      """A special subclass of list used to mark that this command line uses
      special shell characters."""
      pass
  
  
  def execute(args, shell=False, env=None, quiet=False):
      stderr = open(os.devnull, 'wb') if quiet else None
      try:
          return subprocess.check_output(
              args, universal_newlines=True, shell=shell, env=env, stderr=stderr
          )
      finally:
          if stderr:
              stderr.close()
  
subject: Clean up the shell execute() function