Fixed issue in LinkedList insert(_:, at:) method where next?.previous…#724

Merged

kelvinlauKL merged 1 commit intokodecocodes:masterfrom

highborncow:LinkedListFix

Jun 11, 2018

Commits on Jun 11, 2018

Fixed issue in LinkedList insert(_:, at:) method where next?.previous was referencing next itself.
augustoavelino
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