Yoast/wordpress-seo — pull request #848 by jrfnl (2014-03-19 00:22:35+00:00)
Title: Keyword density preg_quote fix

Fix misplaced character in `preg_quote()`. This will probably fix the keyword density issue without the `utf8_encode()`, but I'll leave it up to @barrykooij to test this and remove the `utf8_encode()` if he agrees.