old_contents: """
  A module that implements tooling to enable easy warnings about deprecations.
  """
  from __future__ import absolute_import
  
  import logging
  import warnings
  
  from pip._internal.utils.typing import MYPY_CHECK_RUNNING
  
  if MYPY_CHECK_RUNNING:
      from typing import Any  # noqa: F401
  
  
  class PipDeprecationWarning(Warning):
      pass
  
  
  class Pending(object):
      pass
  
  
  class RemovedInPip12Warning(PipDeprecationWarning, Pending):
      pass
  
  
  # Warnings <-> Logging Integration
  
  
  _warnings_showwarning = None  # type: Any
  
  
  def _showwarning(message, category, filename, lineno, file=None, line=None):
      if file is not None:
          if _warnings_showwarning is not None:
              _warnings_showwarning(
                  message, category, filename, lineno, file, line,
              )
      else:
          if issubclass(category, PipDeprecationWarning):
              # We use a specially named logger which will handle all of the
              # deprecation messages for pip.
              logger = logging.getLogger("pip._internal.deprecations")
  
              # This is purposely using the % formatter here instead of letting
              # the logging module handle the interpolation. This is because we
              # want it to appear as if someone typed this entire message out.
              log_message = "DEPRECATION: %s" % message
  
              # PipDeprecationWarnings that are Pending still have at least 2
              # versions to go until they are removed so they can just be
              # warnings.  Otherwise, they will be removed in the very next
              # version of pip. We want these to be more obvious so we use the
              # ERROR logging level.
              if issubclass(category, Pending):
                  logger.warning(log_message)
              else:
                  logger.error(log_message)
          else:
              _warnings_showwarning(
                  message, category, filename, lineno, file, line,
              )
  
  
  def install_warning_logger():
      # Enable our Deprecation Warnings
      warnings.simplefilter("default", PipDeprecationWarning, append=True)
  
      global _warnings_showwarning
  
      if _warnings_showwarning is None:
          _warnings_showwarning = warnings.showwarning
          warnings.showwarning = _showwarning
  
new_contents: """
  A module that implements tooling to enable easy warnings about deprecations.
  """
  from __future__ import absolute_import
  
  import logging
  import warnings
  
  from pip._internal.utils.typing import MYPY_CHECK_RUNNING
  
  if MYPY_CHECK_RUNNING:
      from typing import Any  # noqa: F401
  
  
  class PipDeprecationWarning(Warning):
      pass
  
  
  class PipPendingDeprecationWarning(PipDeprecationWarning):
      pass
  
  
  _warnings_showwarning = None  # type: Any
  
  
  # Warnings <-> Logging Integration
  def _showwarning(message, category, filename, lineno, file=None, line=None):
      if file is not None:
          if _warnings_showwarning is not None:
              _warnings_showwarning(
                  message, category, filename, lineno, file, line,
              )
      elif issubclass(category, PipDeprecationWarning):
          # We use a specially named logger which will handle all of the
          # deprecation messages for pip.
          logger = logging.getLogger("pip._internal.deprecations")
  
          # This is purposely using the % formatter here instead of letting
          # the logging module handle the interpolation. This is because we
          # want it to appear as if someone typed this entire message out.
          log_message = "DEPRECATION: %s" % message
  
          # PipPendingDeprecationWarnings still have at least 2
          # versions to go until they are removed so they can just be
          # warnings.  Otherwise, they will be removed in the very next
          # version of pip. We want these to be more obvious so we use the
          # ERROR logging level.
          if issubclass(category, PipPendingDeprecationWarning):
              logger.warning(log_message)
          else:
              logger.error(log_message)
      else:
          _warnings_showwarning(
              message, category, filename, lineno, file, line,
          )
  
  
  def install_warning_logger():
      # Enable our Deprecation Warnings
      warnings.simplefilter("default", PipDeprecationWarning, append=True)
  
      global _warnings_showwarning
  
      if _warnings_showwarning is None:
          _warnings_showwarning = warnings.showwarning
          warnings.showwarning = _showwarning
  
subject: Rename deprecation warnings to not be versioned