    will generate a :class:`CommandError`.
  
  .. versionadded:: 1.6
  
  The ``leave_locale_alone`` option was added in Django 1.6.
  
  Methods
  -------
  
  :class:`BaseCommand` has a few methods that can be overridden but only
 
</s> remove The ``--no-startup`` option was added in Django 1.6.
 </s> add     The ``--no-startup`` option was added in Django 1.6. </s> remove             The ``content_type`` attribute was added.
 </s> add  </s> remove         Historically, this parameter was only called ``mimetype`` (now
        deprecated), but since this is actually the value included in the HTTP
        ``Content-Type`` header, it can also include the character set
        encoding, which makes it more than just a MIME type specification. If
        ``mimetype`` is specified (not ``None``), that value is used.
        Otherwise, ``content_type`` is used. If neither is given,
        :setting:`DEFAULT_CONTENT_TYPE` is used.
 </s> add             Historically, this parameter was only called ``mimetype`` (now
            deprecated), but since this is actually the value included in the HTTP
            ``Content-Type`` header, it can also include the character set
            encoding, which makes it more than just a MIME type specification. If
            ``mimetype`` is specified (not ``None``), that value is used.
            Otherwise, ``content_type`` is used. If neither is given,
            :setting:`DEFAULT_CONTENT_TYPE` is used. </s> remove If a backend raises a :class:`~django.core.exceptions.PermissionDenied`
exception, authentication will immediately fail. Django won't check the
backends that follow.
 </s> add     If a backend raises a :class:`~django.core.exceptions.PermissionDenied`
    exception, authentication will immediately fail. Django won't check the
    backends that follow.
    The ``leave_locale_alone`` option was added in Django 1.6.
    will generate a :class:`CommandError`.
  
  .. versionadded:: 1.6
  
    The ``leave_locale_alone`` option was added in Django 1.6.
  
  Methods
  -------
  
  :class:`BaseCommand` has a few methods that can be overridden but only
keep keep keep keep replace keep keep keep keep keep
 Adapted uses of versionchanged/versionadded to the new form.

Refs #20104. 
docs/howto/custom-management-commands.txt