Issue with spaced ? in pipeline

[Anton-4]

The code below should work:

app [main!] { pf: platform "https://github.com/roc-lang/basic-cli/releases/download/0.19.0/Hj-J_zxz7V9YurCSTFcFdu6cQJie4guzsPMUi5kBYUk.tar.br" }

import pf.Arg
import pf.Stdout

parse_arg = |arg|
    { after, before } = Str.split_first(arg, ".")?
    Ok (Str.to_dec(before)?, Str.to_dec(after)?)

main! : List Arg.Arg => Result {} [Exit I32 Str]
main! = |args|
    args
    |> List.map(Arg.display)
    |> List.map_try(parse_arg) ? |_| Exit 1 "Invalid arg"
    |> List.for_each! |(day, sub)| Stdout.line! "Solving problem forday ${Num.to_str day} sub ${Num.to_str sub}" ?? {}
    |> Ok

But for now it returns an error:

The map_try function expects 2 arguments, but it got only 1:

14│      |> List.map_try(parse_arg)
            ^^^^^^^^^^^^

Useful context: #7530

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