New lines in mail title

[tomwys]

Error processing post_process() on "<class 'sentry.plugins.sentry_mail.MailProcessor'>": BadHeaderError('Header values can't contain newlines (got u'[Sentry] [Default] ERROR: IntegrityError: duplicate key value violates unique constraint "facebook_profile_facebookuserprofile_about_me_key"\n' for header 'Subject')',)

Stacktrace (most recent call last):

File "sentry/processors/base.py", line 24, in send_group_processors
logger.exception('Error processing post_process() on %r: %s', inst.class, e)

File "sentry/plugins/bases/notify.py", line 79, in post_process
self.notify_users(group, event)

File "sentry/plugins/sentry_mail/init.py", line 139, in notify_users
fail_silently=fail_silently,

File "sentry/plugins/sentry_mail/init.py", line 87, in _send_mail
msg.send(fail_silently=fail_silently)

File "django/core/mail/message.py", line 251, in send
return self.get_connection(fail_silently).send_messages([self])

File "django/core/mail/backends/smtp.py", line 92, in send_messages
self._lock.release()

File "django/core/mail/backends/smtp.py", line 107, in _send
raise

File "django/core/mail/message.py", line 219, in message
msg['Subject'] = self.subject

File "django/core/mail/message.py", line 151, in setitem
name, val = forbid_multi_line_headers(name, val, self.encoding)

File "django/core/mail/message.py", line 87, in forbid_multi_line_headers
raise BadHeaderError("Header values can't contain newlines (got %r for header %r)" % (val, name))```