MultiLineLambdaClosingNewline concats lambda arguments

[nojaf]

Issue created from fantomas-online

Code

let choose chooser source =
    source
    |> Set.fold
        (fun set item ->
            chooser item
            |> Option.map (fun mappedItem -> Set.add mappedItem set)
            |> Option.defaultValue set)
        Set.empty

Result

let choose chooser source =
    source
    |> Set.fold
        (fun setitem ->
            chooser item
            |> Option.map(fun mappedItem -> Set.add mappedItem set)
            |> Option.defaultValue set
        )
        Set.empty

Problem description

Following up on #1407
set and item are merged together.

Extra information

• The formatted result breaks by code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas Master at 01/31/2021 20:14:08 - a98f88d

    { config with
                SpaceBeforeLowercaseInvocation = false
                MultiLineLambdaClosingNewline = true }

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}