old_contents: from libcloud.compute.types import Provider
  from libcloud.compute.providers import get_driver
  
  EC2_ACCESS_ID = 'your access id'
  EC2_SECRET_KEY = 'your secret key'
  
  cls = get_driver(Provider.EC2)
  driver = cls(EC2_ACCESS_ID, EC2_SECRET_KEY)
  sizes = driver.list_sizes()
  
  >>> sizes[:5]
  [<NodeSize: id=t1.micro, name=Micro Instance, ram=613 disk=15 bandwidth=None price=0.02 driver=Amazon EC2 ...>,
   <NodeSize: id=m1.small, name=Small Instance, ram=1740 disk=160 bandwidth=None price=0.065 driver=Amazon EC2 ...>,
   <NodeSize: id=m1.medium, name=Medium Instance, ram=3700 disk=410 bandwidth=None price=0.13 driver=Amazon EC2 ...>,
   <NodeSize: id=m1.large, name=Large Instance, ram=7680 disk=850 bandwidth=None price=0.26 driver=Amazon EC2 ...>,
   <NodeSize: id=m1.xlarge, name=Extra Large Instance, ram=15360 disk=1690 bandwidth=None price=0.52 driver=Amazon EC2 ...>]
  >>> sizes[0].price
  0.02
  >>>
  
new_contents: from libcloud.compute.types import Provider
  from libcloud.compute.providers import get_driver
  
  EC2_ACCESS_ID = 'your access id'
  EC2_SECRET_KEY = 'your secret key'
  
  cls = get_driver(Provider.EC2)
  driver = cls(EC2_ACCESS_ID, EC2_SECRET_KEY)
  sizes = driver.list_sizes()
  
  # >>> sizes[:2]
  # [<NodeSize: id=t1.micro, name=Micro Instance, ram=613 disk=15 bandwidth=None
  #   price=0.02 driver=Amazon EC2 ...>,
  # <NodeSize: id=m1.small, name=Small Instance, ram=1740 disk=160 bandwidth=None
  #  price=0.065 driver=Amazon EC2 ...>,
  # >>> sizes[0].price
  # 0.02
  # >>>
  
subject: Fix pep8 violations in the doc examples.