old_contents: from pkg_resources import get_distribution
  
  from .hookspecs import hookspec, hookimpl  # noqa
  
  _version = get_distribution('tox').version
  __version__ = _version.split("+", 1)[0]
  
  class exception:
      class Error(Exception):
          def __str__(self):
              return "%s: %s" % (self.__class__.__name__, self.args[0])
  
      class ConfigError(Error):
          """ error in tox configuration. """
      class UnsupportedInterpreter(Error):
          "signals an unsupported Interpreter"
      class InterpreterNotFound(Error):
          "signals that an interpreter could not be found"
      class InvocationError(Error):
          """ an error while invoking a script. """
      class MissingFile(Error):
          """ an error while invoking a script. """
      class MissingDirectory(Error):
          """ a directory did not exist. """
      class MissingDependency(Error):
          """ a dependency could not be found or determined. """
      class MinVersionError(Error):
          """ the installed tox version is lower than requested minversion. """
  
          def __init__(self, message):
              self.message = message
              super(exception.MinVersionError, self).__init__(message)
  
  from tox.session import main as cmdline  # noqa
  
new_contents: from pkg_resources import get_distribution
  
  from .hookspecs import hookspec, hookimpl  # noqa
  
  _version = get_distribution('tox').version
  __version__ = _version.split("+", 1)[0]
  
  
  class exception:
      class Error(Exception):
          def __str__(self):
              return "%s: %s" % (self.__class__.__name__, self.args[0])
  
      class ConfigError(Error):
          """ error in tox configuration. """
      class UnsupportedInterpreter(Error):
          "signals an unsupported Interpreter"
      class InterpreterNotFound(Error):
          "signals that an interpreter could not be found"
      class InvocationError(Error):
          """ an error while invoking a script. """
      class MissingFile(Error):
          """ an error while invoking a script. """
      class MissingDirectory(Error):
          """ a directory did not exist. """
      class MissingDependency(Error):
          """ a dependency could not be found or determined. """
      class MinVersionError(Error):
          """ the installed tox version is lower than requested minversion. """
  
          def __init__(self, message):
              self.message = message
              super(exception.MinVersionError, self).__init__(message)
  
  from tox.session import main as cmdline  # noqa
  
subject: fix pep8 error