Allow elm-format to run even if there are syntax errors

Sloppily indented parenthesis around a case expression is invalid syntax according to the plugin, but valid according to the compiler:

test maybe =
    String.fromInt
        (case maybe of
            Just _ ->
                1

            Nothing ->
                2
            )

What’s annoying is that this blocks elm-format from fixing it.

Also, I think it’d be good if the plugin would attempt to run elm-format even if there’s a syntax error, because some errors can actually be fixed by elm-format.

Invalid indentation, but elm-format fixes it:

type alias Test =
{foo : String}

Elm-format automatically replaces : with =

test = {foo:"foo"}

[klazuka]

The first issue is a dupe of #22, which I have ignored for too long. I’ll prioritize fixing it.

The 2nd and 3rd are both treated as syntax errors by the compiler.

I’m going to rename this issue so that it emphasizes the part about letting elm-format run even if there are syntax errors.

[klazuka]

@Herteby agreed. I’ll do the quick fix right now. I don’t think there’s much we can do with nice error output since we can’t get the --report=json data passed through from the Elm compiler to elm-format.