email sending occasionally breaks

[basilleaf]

on the headline maybe? checkit:

email sent
Traceback (most recent call last):
File "topstories.py", line 145, in
topstories = update_topstories()
File "topstories.py", line 138, in update_topstories
send_email_update(new_top_stories)
File "topstories.py", line 36, in send_email_update
send_email(subject, msg, ADMIN_EMAIL)
File "/app/util.py", line 15, in send_email
msg = MIMEText(body)
File "/app/.heroku/python/lib/python2.7/email/mime/text.py", line 30, in init
self.set_payload(_text, _charset)
File "/app/.heroku/python/lib/python2.7/email/message.py", line 226, in set_payload
self.set_charset(charset)
File "/app/.heroku/python/lib/python2.7/email/message.py", line 262, in set_charset
self._payload = self._payload.encode(charset.output_charset)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2019' in position 7: ordinal not in range(128)