old_contents: # -*- coding: utf-8 -*-
  """
  The MIT License (MIT)
  
  Copyright (c) 2015-2016 Rapptz
  
  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.
  """
  
  from discord.errors import DiscordException
  
  
  __all__ = [ 'CommandError', 'MissingRequiredArgument', 'BadArgument',
             'NoPrivateMessage', 'CheckFailure', 'CommandNotFound',
             'DisabledCommand', 'CommandInvokeError' ]
  
  class CommandError(DiscordException):
      """The base exception type for all command related errors.
  
      This inherits from :exc:`discord.DiscordException`.
  
      This exception and exceptions derived from it are handled
      in a special way as they are caught and passed into a special event
      from :class:`Bot`\, :func:`on_command_error`.
      """
      pass
  
  class CommandNotFound(CommandError):
      """Exception raised when a command is attempted to be invoked
      but no command under that name is found.
  
      This is not raised for invalid subcommands, rather just the
      initial main command that is attempted to be invoked.
      """
  
  class MissingRequiredArgument(CommandError):
      """Exception raised when parsing a command and a parameter
      that is required is not encountered.
      """
      pass
  
  class BadArgument(CommandError):
      """Exception raised when a parsing or conversion failure is encountered
      on an argument to pass into a command.
      """
      pass
  
  class NoPrivateMessage(CommandError):
      """Exception raised when an operation does not work in private message
      contexts.
      """
      pass
  
  class CheckFailure(CommandError):
      """Exception raised when the predicates in :attr:`Command.checks` have failed."""
      pass
  
  class DisabledCommand(CommandError):
      """Exception raised when the command being invoked is disabled."""
      pass
  
  class CommandInvokeError(CommandError):
      """Exception raised when the command being invoked raised an exception.
  
      Attributes
      -----------
      original
          The original exception that was raised. You can also get this via
          the ``__cause__`` attribute.
      """
      def __init__(self, e):
          self.original = e
          super().__init__('Command raised an exception: {0.__class__.__name__}: {0}'.format(e))
  
new_contents: # -*- coding: utf-8 -*-
  """
  The MIT License (MIT)
  
  Copyright (c) 2015-2016 Rapptz
  
  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.
  """
  
  from discord.errors import DiscordException
  
  
  __all__ = [ 'CommandError', 'MissingRequiredArgument', 'BadArgument',
             'NoPrivateMessage', 'CheckFailure', 'CommandNotFound',
             'DisabledCommand', 'CommandInvokeError' ]
  
  class CommandError(DiscordException):
      """The base exception type for all command related errors.
  
      This inherits from :exc:`discord.DiscordException`.
  
      This exception and exceptions derived from it are handled
      in a special way as they are caught and passed into a special event
      from :class:`Bot`\, :func:`on_command_error`.
      """
      def __init__(self, message):
          # clean-up @everyone and @here mentions
          m = message.replace('@everyone', '@\u200beveryone').replace('@here', '@\u200bhere')
          super().__init__(m)
  
  class CommandNotFound(CommandError):
      """Exception raised when a command is attempted to be invoked
      but no command under that name is found.
  
      This is not raised for invalid subcommands, rather just the
      initial main command that is attempted to be invoked.
      """
      pass
  
  class MissingRequiredArgument(CommandError):
      """Exception raised when parsing a command and a parameter
      that is required is not encountered.
      """
      pass
  
  class BadArgument(CommandError):
      """Exception raised when a parsing or conversion failure is encountered
      on an argument to pass into a command.
      """
      pass
  
  class NoPrivateMessage(CommandError):
      """Exception raised when an operation does not work in private message
      contexts.
      """
      pass
  
  class CheckFailure(CommandError):
      """Exception raised when the predicates in :attr:`Command.checks` have failed."""
      pass
  
  class DisabledCommand(CommandError):
      """Exception raised when the command being invoked is disabled."""
      pass
  
  class CommandInvokeError(CommandError):
      """Exception raised when the command being invoked raised an exception.
  
      Attributes
      -----------
      original
          The original exception that was raised. You can also get this via
          the ``__cause__`` attribute.
      """
      def __init__(self, e):
          self.original = e
          super().__init__('Command raised an exception: {0.__class__.__name__}: {0}'.format(e))
  
subject: Make it so CommandError does not contain @everyone mentions.