Non-idempotent 'else (if ..)' formatting

[justinmimbs]

On this nested if expression, the first pass of elm-format removes the parens, and the second pass removes the indentation.

f =
    if x then
        y

    else
        (if a then
            b

         else
            c
        )

First pass:

f =
    if x then
        y

    else
        if a then
            b

        else
            c

Second pass:

f =
    if x then
        y

    else if a then
        b

    else
        c

While looking to see if this already was reported, I found #427, which proposes preserving indentation like the first pass above. I like that idea, as I was originally trying to format some logic with the same kind of symmetry described there when I came across this non-idempotent behavior.

Thank you for such a wonderful tool that has given me much comfort and saved me countless hours over the years!

Justin