Errata

In the second code block, the following example is provided for running in the Elm REPL:

---
> list = ​List​.range 1 10​ 
[1,2,3,4,5,6,7,8,9,10] : ​List​ ​Int​​ ​

 > list \​ 
| |> ​List​.map (\n -> n * 2) \
​ | |> ​Debug​.log ​"​​doubled"​ \​ 
| |> ​List​.filter (\n -> n > 6) \​ 
| |> ​Debug​.log ​"​​filtered"​ \​ 
| |> ​List​.map (\n -> n * n)​ 

doubled: [2,4,6,8,10,12,14,16,18,20]​ 
filtered: [8,10,12,14,16,18,20]​
[64,100,144,196,256,324,400] : ​List​ ​Int
---
On a Mac, Elm 0.19.1, this results in the following error:
-- SYNTAX PROBLEM --------------------------------------------------------- REPL

I got stuck here:

4| list \
^
Whatever I am running into is confusing me a lot! Normally I can give fairly
specific hints, but something is really tripping me up this time.
----

To resolve this, I recoded the example as follows:
---
> processList list =
| list
| |> List.map (\n -> n * 2)
| |> Debug.log "doubled"
| |> List.filter (\n -> n > 6)
| |> Debug.log "filtered"
| |> List.map (\n -> n * n)
|
<function> : List number -> List number
> processList (List.range 1 10)
doubled: [2,4,6,8,10,12,14,16,18,20]
filtered: [8,10,12,14,16,18,20]
[64,100,144,196,256,324,400] : List Int
>
---
TBH, I'm not sure whether this is a bug in the REPL or maybe a purposeful change. But the second version does not require the backslash mutli-line character.