jhy/jsoup — pull request #266 by lukepfarrar (2012-11-22 12:06:07+00:00)
Title: http://www.w3.org/TR/xhtml1/#C_16 states:

The [XHTML spec](http://www.w3.org/TR/xhtml1/#C_16) states:

"C.16. The Named Character Reference '

The named character reference `'` (the apostrophe, U+0027) was introduced in XML 1.0 but does not appear in HTML. Authors should therefore use `'` instead of `'` to work as expected in HTML 4 user agents."

While `'` is more human readable, it will be ignored by some clients, so it seems best to ignore it completely.