merge from 3.5
authorSenthil Kumaran <senthil@uthcode.com>
Fri, 22 Jan 2016 05:08:25 +0000 (21:08 -0800)
committerSenthil Kumaran <senthil@uthcode.com>
Fri, 22 Jan 2016 05:08:25 +0000 (21:08 -0800)
minor clarification on Zipfile 'x' mode - exclusive creation of a file.

(Based on the feedback from docs@python.org list)


Trivial merge