buriy/python-readability — pull request #56 by nathanathan (2014-12-19 02:48:26+00:00)
Title: Defaulting to utf-8 when chardet returns None

On articles like this one chardet returns None:
http://news.zing.vn/nhip-song-tre/thay-giao-gay-sot-tung-bo-luat-tinh-yeu/a291427.html
This causes exceptions later on when encoding.lower() is called