astaxie/beego — pull request #720 by MicroMoon (2014-08-02 09:55:42+00:00)
Title: fix the comment of SliceIntersect

The implementations of SliceDiff and SliceIntersect are the same.
However, the comments of them are opposite.
FYI: the former is (slice1 - slice2) while the latter is (slice2- slice1)