old_contents: # -*- coding: utf-8 -*-
  """libtmux exceptions.
  
  libtmux.exc
  ~~~~~~~~~~~
  
  """
  from __future__ import absolute_import, unicode_literals, with_statement
  
  
  class LibTmuxException(Exception):
  
      """Base Exception for libtmux Errors."""
  
  
  class TmuxSessionExists(LibTmuxException):
  
      """Session does not exist in the server."""
  
      pass
  
  
  class TmuxCommandNotFound(LibTmuxException):
  
      """Application binary for tmux not found."""
  
      pass
  
  
  class BadSessionName(LibTmuxException):
  
      """Disallowed session name for tmux (empty, contains periods or colons)."""
  
      pass
  
  
  class OptionError(LibTmuxException):
  
      """Root error for any error involving invalid, ambiguous or bad options."""
  
      pass
  
  
  class UnknownOption(OptionError):
  
      """Option unknown to tmux show-option(s) or show-window-option(s)."""
  
      pass
  
  
  class InvalidOption(OptionError):
  
      """Option invalid to tmux, introduced in tmux v2.4."""
  
      pass
  
new_contents: # -*- coding: utf-8 -*-
  """libtmux exceptions.
  
  libtmux.exc
  ~~~~~~~~~~~
  
  """
  from __future__ import absolute_import, unicode_literals, with_statement
  
  
  class LibTmuxException(Exception):
  
      """Base Exception for libtmux Errors."""
  
  
  class TmuxSessionExists(LibTmuxException):
  
      """Session does not exist in the server."""
  
      pass
  
  
  class TmuxCommandNotFound(LibTmuxException):
  
      """Application binary for tmux not found."""
  
      pass
  
  
  class VersionTooLow(LibTmuxException):
  
      """Raised if tmux below the minimum version to use libtmux."""
  
      pass
  
  
  class BadSessionName(LibTmuxException):
  
      """Disallowed session name for tmux (empty, contains periods or colons)."""
  
      pass
  
  
  class OptionError(LibTmuxException):
  
      """Root error for any error involving invalid, ambiguous or bad options."""
  
      pass
  
  
  class UnknownOption(OptionError):
  
      """Option unknown to tmux show-option(s) or show-window-option(s)."""
  
      pass
  
  
  class InvalidOption(OptionError):
  
      """Option invalid to tmux, introduced in tmux v2.4."""
  
      pass
  
  
  class AmbiguousOption(OptionError):
  
      """Option that could potentially match more than one."""
  
      pass
  
subject: add new option and version exceptions