[Swift/en] Update to Swift 5 and include omitted examples (#3553)

* Update to Swift 5 and include omitted examples

* Reformat lines to ~80 characters

* Fix mistype and add optional chaining
This commit is contained in:
Sam 2019-08-03 07:13:22 -04:00 committed by Divay Prakash
parent a9c3d41253
commit 84cb029617

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