3 errata corriage - #6

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LucaPaterlini wants to merge 3 commits into

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LucaPaterlini:master

Commits on Jul 28, 2019

chapter 1 added anonymous function (wrong implmentation page 21)
lucaSportable
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153afe0
chapter 1 added closures (wrong implmentation page 22)
lucaSportable
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06910bc
chapter 1 added the encoding package snippet (wrong implmentation page 43 return carriage before json)
lucaSportable
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ea2c789