Fixed #20844 -- Made AdminEmailHandler respect LOGGING 'formatter' setting.

                record.getMessage()

            )

            filter = get_exception_reporter_filter(request)

            request_repr = filter.get_request_repr(request)

            request_repr = '\n{0}'.format(filter.get_request_repr(request))

        except Exception:

            subject = '%s: %s' % (

                record.levelname,

                record.getMessage()

            )

            request = None

            request_repr = "Request repr() unavailable."

            request_repr = "unavailable"

        subject = self.format_subject(subject)

        if record.exc_info:

            exc_info = record.exc_info

            stack_trace = '\n'.join(traceback.format_exception(*record.exc_info))

        else:

            exc_info = (None, record.getMessage(), None)

            stack_trace = 'No stack trace available'

        message = "%s\n\n%s" % (stack_trace, request_repr)

        message = "%s\n\nRequest repr(): %s" % (self.format(record), request_repr)

        reporter = ExceptionReporter(request, is_email=True, *exc_info)

        html_message = reporter.get_traceback_html() if self.include_html else None

        mail.mail_admins(subject, message, fail_silently=True,