Make sure infix operator application properly indents righthand multiline expressions

[avh4]

The following is incorrect: Nothing is indented too far.

        div [ id "page" ]
            <| case model.currentDoc of
                   Nothing ->
                       []

Also, what happens if the infix operator is more or less than 2 characters?

[rtfeldman]

What I'd done in the past is to put <| on the previous line to indicate "I want to continue this on the next line", like how \ is used in multiline strings in some languages:

div [ id "page" ] <|
    case model.currentDoc of
        Nothing ->
            []

However, we pretty clearly want the opposite rule for other operators (especially |>) - which is to say that the operator always begins the line. Tough one...

[rtfeldman]

Actually #10 (comment) has a working answer for this too: when faced with multiline, just put the operator on its own line.

div [ id "page" ]
    <|
    case model.currentDoc of
        Nothing ->
            []

Not the most beautiful, but plenty readable!

[avh4]

Fixed for now in 782635f. More thorough opinions are still welcome (please open a new issue).