Fix multiline pipe rendering

[WhileTruu]

Fixes #127

[miniBill]

I'm not sure I follow how it's doing the +4 now, but the tests make sense to me

[WhileTruu]

All I know is that keeping the +4 results in this:

hello : String
hello =
    String.replace "6" "!" <|
        String.replace "5" "d" <|
                String.replace "4" "l" <|
                            String.replace "3" "r" <|
                                            String.replace "2" "o" <|
                                                                String.replace
                                                                                        "1"
                                                                                        "W" <|
                                                                                        "123456"

😀

[miniBill]

Yeah, tbh I just trusts the tests. I could try running it on a bigger codebase and see what happens if @mdgriffith wants

[miniBill]

Tested it in elm-open-api-cli. It's so much better before elm-format, and mostly better after elm-format.

The only regression I found is that a ++ "foo" now gets split, but the tradeoff is super worth it and we can fix that one separately