swift234

Set: print different forms for description and debugDescription

Set.description now prints its array literal form, and
Set.debugDescription prints its initializer form. Both print
the debugDescription of the members.

Set([1,2,3]).description = "[2, 3, 1]"
Set([1,2,3]).debugDescription = "Set([2, 3, 1])"

rdar://problem/19312961

Swift SVN r24306