Revert "Revert "Revert "Update 2017-05-11-week10.markdown"""
Revert "Revert "Revert "Update 2017-05-11-week10.markdown"""

This reverts commit 5e7f558395009c18f01a42039af09c08dbc63d5a.

phellsten/phellsten.github.io,phellsten/phellsten.github.io,phellsten/phellsten.github.io,phellsten/phellsten.github.io