Update v0.16.2.txt
Added description of Pull Request 9544

Can you add this to the PR itself? Just commit this on the branch you are using there and push again.
 Ok, because I had a old fork and I didn't know if I could push correctly.
 No problem! If you have questions with git, just ask! (here or in our dev chat room https://gitter.im/pydata/pandas)
 Thanks :)
