old_contents: #!/usr/bin/env python
  """
  pytest plugin script.
  
  This script is an extension to py.test which
  installs SQLAlchemy's testing plugin into the local environment.
  
  """
  import sys
  import imp
  
  from os import path
  for pth in ['../lib']:
      sys.path.insert(0, path.join(path.dirname(path.abspath(__file__)), pth))
  
  from sqlalchemy.testing.plugin.pytestplugin import *
  
new_contents: #!/usr/bin/env python
  """
  pytest plugin script.
  
  This script is an extension to py.test which
  installs SQLAlchemy's testing plugin into the local environment.
  
  """
  import sys
  
  from os import path
  for pth in ['../lib']:
      sys.path.insert(0, path.join(path.dirname(path.abspath(__file__)), pth))
  
  from sqlalchemy.testing.plugin.pytestplugin import *
  
subject: remove unused import