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* Documented NilClass#blank?Sebastian Martinez2011-04-171-1/+5
* copy-edits 108561fXavier Noria2011-03-051-1/+1
* Adds link to Object.blank? from Object.present?Jonathon D. Jones2011-03-051-1/+1
* Deletes trailing whitespaces (over text files only find * -type f -exec sed '...Santiago Pastorino2010-08-141-1/+1
* Added Object#presence that returns the object if it's #present? otherwise ret...David Heinemeier Hansson2009-12-271-2/+20
* blank? and duplicable? are Object extensionsJeremy Kemper2009-03-211-0/+58