unison/unison-src/transcripts/fix1390.md

```ucm
scratch/main> builtins.merge
```

```unison
-- List.map : (a -> b) -> [a] -> [b]
List.map f =
  go acc = cases
    [] -> acc
    h +: t -> go (acc :+ f h) t
  go []
```

```ucm
scratch/main> add
scratch/main> view List.map
```

```unison
List.map2 : (g -> g2) -> [g] -> [g2]
List.map2 f =
  unused = "just to give this a different hash"
  go acc = cases
    [] -> acc
    h +: t -> go (acc :+ f h) t
  go []
```