Improve HACKING.md

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Julian Ospald 2020-04-13 21:11:00 +02:00
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@ -26,7 +26,7 @@ They're a little safer (less Monoid weirdness with view) and have better error m
vs optics
```
view (_Just % to (++ "abc")) Nothing
> view (_Just % to (++ "abc")) Nothing
<interactive>:2:1: error:
• An_AffineFold cannot be used as A_Getter