old_contents: 
  from __future__ import absolute_import
  
  import functools
  import json  # noqa
  
  
  def strict_constant(o):
      raise ValueError('Out of range float values are not JSON compliant: ' + repr(o))
  
  
  @functools.wraps(json.dump)
  def dump(*args, **kwargs):
      kwargs.setdefault('allow_nan', False)
      return json.dump(*args, **kwargs)
  
  
  @functools.wraps(json.dumps)
  def dumps(*args, **kwargs):
      kwargs.setdefault('allow_nan', False)
      return json.dumps(*args, **kwargs)
  
  
  @functools.wraps(json.load)
  def load(*args, **kwargs):
      kwargs.setdefault('parse_constant', strict_constant)
      return json.load(*args, **kwargs)
  
  
  @functools.wraps(json.loads)
  def loads(*args, **kwargs):
      kwargs.setdefault('parse_constant', strict_constant)
      return json.loads(*args, **kwargs)
  
new_contents: """
  Wrapper for the builtin json module that ensures compliance with the JSON spec.
  
  REST framework should always import this wrapper module in order to maintain
  spec-compliant encoding/decoding. Support for non-standard features should be
  handled by users at the renderer and parser layer.
  """
  
  from __future__ import absolute_import
  
  import functools
  import json  # noqa
  
  
  def strict_constant(o):
      raise ValueError('Out of range float values are not JSON compliant: ' + repr(o))
  
  
  @functools.wraps(json.dump)
  def dump(*args, **kwargs):
      kwargs.setdefault('allow_nan', False)
      return json.dump(*args, **kwargs)
  
  
  @functools.wraps(json.dumps)
  def dumps(*args, **kwargs):
      kwargs.setdefault('allow_nan', False)
      return json.dumps(*args, **kwargs)
  
  
  @functools.wraps(json.load)
  def load(*args, **kwargs):
      kwargs.setdefault('parse_constant', strict_constant)
      return json.load(*args, **kwargs)
  
  
  @functools.wraps(json.loads)
  def loads(*args, **kwargs):
      kwargs.setdefault('parse_constant', strict_constant)
      return json.loads(*args, **kwargs)
  
subject: Add docstring to json wrapper module