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* Add Enumerable#group_by and Array#in_groups_ofMarcel Molina2006-03-011-0/+16
* Added Array#to_sentence that'll turn ['one', 'two', 'three'] into 'one, two, ...David Heinemeier Hansson2005-09-111-2/+2
* Improved performance of Routes generation by a factor of 5 #1434 [Nicholas Se...David Heinemeier Hansson2005-06-241-0/+5