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Author SHA1 Message Date
Jack Nagel
762c355b30 ComparableSet#merge returns self 
Set#merge is supposed to return self, and Formula#recursive_requirements
depended on this being true.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
 2012-10-25 15:54:55 -05:00
Misty De Meo
bbfb6400c7 Manage Requirements using ComparableSet 
ComparableSet only allows a single object of a given class,
choosing the object with the greatest value. This was mainly created
for Requirements, so that, e.g., two X11Dependencies of differing
strictness don't both end up in the same requirement set.

Fixes Homebrew/homebrew#15240.
 2012-10-15 09:46:29 -05:00